1.选择题- (共2题)
1.如图所示，一理想变压器原、副线圈的匝数比为n:1. 原线圈接正弦交变电压U，副线圈接有一个交流电流表和一个电动机. 电动机线圈电阻为R，当变压器的输入端接通电源后，电流表的示数为I，电动机带动一质量为m的重物以速度v匀速上升，则下列判断正确的是 （ ）
2.如图所示，一理想变压器原、副线圈的匝数比为n:1. 原线圈接正弦交变电压U，副线圈接有一个交流电流表和一个电动机. 电动机线圈电阻为R，当变压器的输入端接通电源后，电流表的示数为I，电动机带动一质量为m的重物以速度v匀速上升，则下列判断正确的是 （ ）
2.单项选择- (共6题)
3.
It’s good feeling for student’s to return to school after summer vacation.
| A．a; the | B．a; a | C．a; the | D．a; / |
4.
, the young teacher is the sort of woman to spread sunshine to her students and colleagues thought her smile.
| A．Sensitive and generous | B．Shy and cautions |
| C．Hand wording and confident | D．Lighthearted and optimistic |
5.
I haven’t been my cousin for ages and he has changed recogn
ition.
ition.| A．beyond | B．with | C．for | D．what |
6.
The door opened and in we had never seen before.
| A．did a tall man come |
| B．a tall man did come |
| C．came a tall man |
| D．a tall man came |
7.
—Excuse me, sir. Could you help me?
—Sure ?
—Sure ?
| A．What is that | B．What is it | C．What help | D．What do you want |
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：6
7星难题：0
8星难题：0
9星难题：0