1.选择题- (共2题)
2.如图所示，一台玩具电机的轴上安有一个小皮带轮甲，通过皮带带动皮带轮乙转动(皮带不打滑)，皮带轮乙上离轴心O距离2mm处安有一个圆环P．一根细绳一端固定在圆环P上，另一端固定在对面的支架上，绳呈水平方向且绷直．在绳上悬挂着4个单摆a．b．c．d．已知电动机的转速是149r/min，甲、乙两皮带轮的半径之比为1：5，4个单摆的摆长分别是100cm、80cm、60cm、40cm．电动机匀速转动过程中，哪个单摆的振幅最大：( )
2.单项选择- (共6题)
3.
These plants are watered ＿＿ .
| A．every a few days | B．every third day |
| C．every others day | D．each two days |
4.
The scientist did ＿＿ experiments to test the new drug.
| A．a series of | B．a good many of | C．a great many | D．a lots of |
5.
My family consider ＿＿ a computer, which is considered ＿＿ a great help in our work.
| A．buying; to be | B．buying; being | C．to buy; being | D．to buy; to be |
6.
Guilin is ＿＿ worth ＿＿. Have you been to it?
| A．well; visiting | B．well; to visit | C．very; a visit | D．very; a visit |
7.
He was about to tell me the secret __ _____ someone patted him on the shoulder.
| A．as | B．until | C．while | D．when |
试卷分析
-
【1】题量占比
选择题:(2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：1
7星难题：0
8星难题：5
9星难题：0