1.选择题- (共7题)
1.如图1，在等腰直角三角形ABC中，∠A=90°，BC=6，D，E分别是AC，AB上的点， {#mathml#}{#/mathml#} ，O为BC的中点．将△ADE沿DE折起，得到如图2所示的四棱锥A′﹣BCDE，其中 {#mathml#}{#/mathml#} ．
（Ⅰ）证明：A′O⊥平面BCDE；
（Ⅱ）求O到平面A′DE的距离．
2.如图1，在等腰直角三角形ABC中，∠A=90°，BC=6，D，E分别是AC，AB上的点， {#mathml#}{#/mathml#} ，O为BC的中点．将△ADE沿DE折起，得到如图2所示的四棱锥A′﹣BCDE，其中 {#mathml#}{#/mathml#} ．
（Ⅰ）证明：A′O⊥平面BCDE；
（Ⅱ）求O到平面A′DE的距离．
2.单项选择- (共9题)
8.
The large family is really a heavy_______ on his shoulder, so he has to work day and night.
| A．job | B．challenge | C．load | D．weight |
9.
A completely new situation will______ when a new tool comes into use.
| A．arise | B．rise | C．raise | D．arouse |
10.
If you forget ______ your watch, it is likely to stop soon.
| A．to wind up | B．to wind off | C．winding up | D．winding off |
11.
---Anna, you look so tired and wet all over!
---Well, you know, all morning I _______ my books to my new office on the third floor.
---Well, you know, all morning I _______ my books to my new office on the third floor.
| A．am moving | B．have moved | C．had moved | D．have been moving |
12.
---It was dangerous to throw that bottle out of the window. You could have hurt someone.
---I’m so sorry! I _______ .
---I’m so sorry! I _______ .
| A．am not thinking | B．wasn’t thinking | C．haven’t thought | D．don’t think |
13.
— The “No.1 Document” is designed to help the rural population increase their incomes.
— I believe that peasants’ life ______ better and better.
A. will have got B. has got C. gets D. will be getting
— I believe that peasants’ life ______ better and better.
A. will have got B. has got C. gets D. will be getting
14.
Not only ______ to look after her children, but also _____ to work.
| A．she had; did she have | B．did she have; she had |
| C．she had; she had | D．did she have; did she have |
15.
It was not until the end of last year _____ the economy in our country began to develop rapidly.
| A．when | B．that | C．which | D．in which |
试卷分析
-
【1】题量占比
选择题:(7道)
单项选择:(9道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：1
5星难题：0
6星难题：2
7星难题：0
8星难题：6
9星难题：0