1.选择题- (共6题)
4.某建筑工地的工人为了运送瓦片,用两根截面为正方形的木料AB､CD,支在水平地面上形成斜面,AB与CD平行且与地面有相同的倾角α,如图所示.从斜面上端将几块瓦片叠放在一起无初速释放,让瓦片沿木料下滑到地面(瓦片截面可视为一段圆弧),现发现因滑到地面时速度过大而造成瓦片破裂.为了不使瓦片破裂,在不改变斜面倾角α的前提下,可以采取的措施是( )
2.单项选择- (共6题)
7.
The old woman found herself ______ when she left the market.
| A．cheating | B．cheated |
| C．to be cheated | D．to have cheated |
8.
They would not allow him _______ climbing Mount Everest.
| A．to risk to | B．to risk going | C．risking going | D．risk going |
9.
Doctors believe that only a small number of people ____ of this kind of disease.
| A．is in danger | B．is in a danger |
| C．are in danger | D．are in the danger |
10.
Public service advertisements are often run _____ free, and are ______ to educate people about health, safety, or any other issue which affects public welfare.
| A．for, mean | B．for, meant | C．of, to mean | D．in, meaning |
11.
_____ books you have borrowed from the library should be returned in two weeks’ time.
| A．Whatever | B．However | C．No matter what | D．What |
试卷分析
-
【1】题量占比
选择题:(6道)
单项选择:(6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：0
5星难题：0
6星难题：0
7星难题：0
8星难题：6
9星难题：0