配电箱要设置在便于操作的地方,并且还要有防雨、防晒等设施。
A. 对
B. 错
What does not belong to the common customs of the Mid-Autumn Festival in the following choices?
A. Worshipping the moon
B. Eating the mooncakes
C. Drinking Osmanthus Wine.
D. Setting off fireworks
On Thanksgiving Day,one of the two people each taking one end of the wishbone and pulling, whoever ends up with the shorter part of the bone will get his wish come true.
A. 对
B. 错
极化继电器衔铁的偏转方向取决于:
A. 线圈通电产生的磁通方向
B. 永久磁铁产生的极化磁通的方向
C. 线圈通电产生的磁通的大小
D. 永久磁铁产生的极化磁通的大小