1.选择题- (共7题)
1.
如图，长为2l的直导线折成边长相等，夹角为60°的V形，并置于与其所在平面相垂直的匀强磁场中，磁感应强度为B．当在该导线中通以电流强度为I的电流时，该V形通电导线受到的安培力大小为（ ）
2.
如图，长为2l的直导线折成边长相等，夹角为60°的V形，并置于与其所在平面相垂直的匀强磁场中，磁感应强度为B．当在该导线中通以电流强度为I的电流时，该V形通电导线受到的安培力大小为（ ）
3.
如图，长为2l的直导线折成边长相等，夹角为60°的V形，并置于与其所在平面相垂直的匀强磁场中，磁感应强度为B．当在该导线中通以电流强度为I的电流时，该V形通电导线受到的安培力大小为（ ）
4.
如图，长为2l的直导线折成边长相等，夹角为60°的V形，并置于与其所在平面相垂直的匀强磁场中，磁感应强度为B．当在该导线中通以电流强度为I的电流时，该V形通电导线受到的安培力大小为（ ）
7.
如图所示，在磁感应强度为0.2T的匀强磁场中，有一长为0.6m的导体AB在金属框架上以10m/s的速度向右匀速滑动，且金属框架的宽度也为0.6m，已知R1=R2=5Ω，导体AB的电阻r=0.5Ω，其余电阻不计．求：
2.单项选择- (共7题)
8.
Money can not take ______place of our happiness, which is _______common sense for many of us.
| A．the ; a | B．不填; a | C．the ; the | D．不填; the |
9.
Having finished her project ,she was invited by the school______ to the new students.
| A．speaking | B．having spoken | C．to speak | D．to have spoken |
10.
That Jill was worried seemed _____ to everyone present at the meeting.
| A．constant | B．evident | C．previous | D．rough |
11.
We used to see each other ______,but I haven’t heard from him since last year.
| A．especially | B．particularly | C．regularly | D．approximately |
12.
---Can I join your club, dad?
---You can when you _______ a bit older.
---You can when you _______ a bit older.
| A．are getting | B．will get | C．get | D．will have got |
13.
The calculations, had they been done by hand, ______all practical value by the time they were finished.
| A．had lost | B．would lose | C．should have lost | D．would have lost |
试卷分析
-
【1】题量占比
选择题:(7道)
单项选择:(7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：5
7星难题：0
8星难题：1
9星难题：0