1.选择题- (共5题)
1.如图4所示，两根相距为l的平行直导轨ab、cd，b、d间连有一固定电阻R，导轨电阻可忽略不计．MN为放在ab和cd上的一导体杆，与ab垂直，其电阻也为R.整个装置处于匀强磁场中，磁感应强度的大小为B，方向垂直于导轨所在平面(指向图中纸面内)．现对杆MN施力使它沿导轨方向以速度v做匀速运动．令U表示MN两端电压的大小，则
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2.如图5所示，金属棒ab置于水平放置的光滑框架cdef上，棒与框架接触良好，匀强磁场垂直于ab棒斜向下．从某时刻开始磁感应强度均匀减小(假设不会减至零)，同时施加一个水平外力F使金属棒ab保持静止，则F ( )
2.单项选择- (共6题)
6.
Charles Darwin, a young man just out of university, knew perfect well that he had to depend on _____ when he set out on a voyage of discovery around the world.
| A．him | B．himself | C．themselves | D．them |
7.
He started to work dilligently _____ he came up with the idea of hybrid rice for the first time in the 1960’s.
| A．at once | B．the moment | C．for the moment | D．in no time |
8.
The impact of Einstein’s breakthrough in the field of photo electric effect ____ the understanding of the universe was simply tremendous.
| A．in | B．on | C．with | D．about |
9.
It was for his excellent work _____he had done lately ____ he was awarded the Nobel Prize for Physics.
| A．that… which | B．which … which | C．that… / | D．that … that |
10.
Almost all English prepositions ______ look like verbs.
| A．when they turn into Chinese | B．when turning into Chinese |
| C．when they turned into Chinese | D．when turned into Chinese |
试卷分析
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【1】题量占比
选择题:(5道)
单项选择:(6道)
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【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：6
7星难题：0
8星难题：0
9星难题：0