问题
选择题
My sister, as well as one of her classmates who_____ late for class, _____ criticized by Mr. Hunt. [ ]
A. were; was
B. was; were
C. was; was
D. were; were
答案
答案：A
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My sister, as well as one of her classmates who_____ late for class, _____ criticized by Mr. Hunt. [ ]
A. were; was
B. was; were
C. was; was
D. were; were
答案：A
在探究磁场产生电流的条件时，做了下面实验（下右图）：由线圈，电流表构成的闭
合回路。条形磁铁提供磁场。请填写观察到现象:
| 实验过程 | 电流表的指针（填偏转或不偏转） |
| 条形磁铁插入线圈过程 | |
| 条形磁铁静止在线圈中 | |
| 条形磁铁从线圈中抽出过程 |
由这个实验可以得出磁场产生电流的条件是： 。