题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-77206.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-81255.gif)
把△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-34034.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-42824.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-57877.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-39537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-39537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-90450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-17486.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-35439.gif)
(1) 求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-78415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
(2) 求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-30944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-97162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-28325.gif)
图1 图2
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-30261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-93869.gif)
解析
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-66136.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-56253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-70800.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-14863.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-88729.gif)
∴△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-34034.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-41544.gif)
在图5中,
∵点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-90450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-39537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-68964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-42997.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-68964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-28423.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-22523.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-23921.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-93748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-99011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-64988.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-70955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-78415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-80267.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083706-89023.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083706-13779.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083706-38144.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083706-28560.gif)
∴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-78415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-30261.gif)
(2) 解:取
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-42824.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083707-28914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083707-28595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083707-36047.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083707-54353.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083707-97010.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-68964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-44886.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-75298.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-94173.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-63212.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083709-95559.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-63212.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083709-88043.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-63212.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083709-29348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-63212.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083709-51812.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083710-58844.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-30944.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083710-34211.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083710-40541.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083710-90388.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083711-93176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083711-73539.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083711-18811.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083711-15700.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083711-87461.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083708-63212.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083712-12560.gif)
∴二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-30944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-93869.gif)
方法二:
解:在图4中,
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-66136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083712-14712.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-56253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-70800.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083702-14863.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-88729.gif)
∴△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083658-34034.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-41544.gif)
在图5中,
∵点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-90450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-39537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083712-52449.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-68964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-42997.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083703-68964.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-28423.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-22523.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-23921.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-93748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-99011.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083705-64988.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
连接
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083712-73516.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-84979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-41473.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-77295.gif)
∴Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-84979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-23123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-41473.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-60034.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083714-96209.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083714-41718.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083714-86082.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083714-50563.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083715-38729.gif)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083713-84979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083715-30968.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083715-25861.gif)
以点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-90450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083715-32903.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083715-84180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083704-28423.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083716-21421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083716-20946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083716-13529.gif)
间直角坐标系
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083716-63233.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083717-69791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083717-37741.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083717-93775.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083717-60180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083718-30917.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083718-67314.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083718-68992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083719-36617.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083719-54776.gif)
(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083719-71552.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083719-41329.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083719-97226.gif)
∴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-78415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-18838.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-30261.gif)
(2) 设平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-45068.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-26308.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-38699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-22364.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-39432.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083721-88733.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083721-18573.gif)
∴n
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083721-71150.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083720-45068.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083718-68992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083659-25135.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083721-74816.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083722-59137.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083722-99880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083722-95784.gif)
∵二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-30944.gif)
∴二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083700-30944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083701-93869.gif)
核心考点
试题【如图1,在直角梯形中, ,把△沿对角线折起后如图2所示(点记为点), 点在平面上的正投影 落在线段上, 连接. (1) 求直线与平面所成的角的大小;(2) 】;主要考察你对线线角等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083631-41937.gif)
P为侧棱SD上的点。
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083631-50208.jpg)
(Ⅰ)求证:AC⊥SD;
(Ⅱ)若SD⊥平面PAC,求二面角P-AC-D的大小
(Ⅲ)在(Ⅱ)的条件下,侧棱SC上是否存在一点E,使得BE∥平
面PAC。若存在,求SE:EC的值
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083631-52544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083624-95241.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083624-16063.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083624-98247.gif)
A.2 | B.1 | C.![]() | D.![]() |
已知三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083617-95752.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083617-82896.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083617-15744.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083617-59481.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083618-49166.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083618-98812.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083618-79924.gif)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083618-82636.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083609-54268.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083609-86879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083609-53559.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083609-80923.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083610-75325.gif)
A.2 | B.4 | C.0 | D.2或4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-79273.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-48336.gif)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-86377.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-62757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-41455.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-62757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-55484.gif)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-23879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-53350.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-70573.gif)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-13894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-53350.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083604-11980.gif)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083604-67005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-86377.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083604-58080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083602-62757.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083604-58080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083603-55484.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022083604-58080.gif)
其中真命题的序号是( )
A.①和② | B.① | C.①④ | D.③ |
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- 2The road is designed for only motor vehicles, so once_____ ,
- 3如图是某个几何体的三视图,该几何体是( )A.长方体B.圆锥C.圆柱D.三棱柱
- 4现有下图所示仪器和装置,请回答下列问题:(1)写出A、F、G三种仪器的名称:A______;F______;G_____
- 5模式图是表达地理事物的重要方式。读“以南极点为中心的气压带、风带分布模式图”,回答下列各题。小题1:图中字母E所表示的气
- 6如图所示,该几何体的俯视图是[ ]A.B.C.D.
- 7为了测定小木板和斜面间的动摩擦因数,某同学设计了如下的实验。在小木板上固定一个弹簧测力计(质量不计),弹簧测力计下吊一个
- 8During the last fifteen years of my mother"s life she suffer
- 9– John seems to be upset. What happened? -- The boss dislike
- 10How did you get into ___? [ ]A. such a mess B. a
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- 1对于光的衍射现象,下述定性分析中错误的是( )A.光的衍射是光在传播过程中绕过障碍物继续传播的现象B.光的衍射否定了
- 2狼在很多人眼里是凶残、贪婪的动物,但是也有些人认为狼身上也有很多值得学习的东西。为此张俊同学和刘涛同学还发生了争执。小题
- 32009年10月16日,《海口晚报》报道:海口男子梁某因假冒客服发布虚假中奖信息被逮捕。所以,在我国,公民的言论自由受法
- 42011年6月30日,全国人大常委会表决通过了《关于修改个人所得税法的决定》。根据决定,个税起征点将从现行的2000元提
- 5甲、乙两组数据的样本容量相同,甲样本的方差为0.102 ,乙样本的方差是0.06 ,那么 [ ]A .甲的波动比
- 6Last year, another two beautiful bridges ___________ over th
- 7【题文】某同学用显微镜观察玻片标本时,发现视野中有污点存在,移动玻片时污点不动,换上高倍物镜,污点仍存在,那么污点在(&
- 8下列各句中,画线成语使用恰当的一项是A.孔子认为在家说话时温和恭顺;与下大夫谈话时无所顾忌,侃侃而谈;而与上大夫或国君谈
- 9请阅读下面的文字,按要求作文。 诸葛孔明言“非宁静无以致远”,朱光潜说“静”中悠然遐想能得无穷妙悟。静,不仅是一种状态
- 10下列各化肥属于复合化肥的是( )A.NH4NO3B.KClC.Ca(H2PO4)2D.KNO3