异步电动机在运行中发生一相断线时，电动机（）。
A、会停转
B、转速下降
C、转速上升
D、转数不变
参考答案：B
预算定额中人工工日消耗量应包括()。
A.基本用工和人工幅度差用工
B.辅助用工和基本用工
C.基本用工和其他用工
D.基本用工、辅助用工和人工幅度差用工
选词填空。
1. Where ____________ (do, does) the rain come from?
2. The sun ____________ (shine, shines) and the water ____________ (become, becomes) vapour.
3. Can you help me ____________ (go up, goes up) to the sky again?
4. First, we ____________ (has, have) the seed.
5. Wait for the flower ____________ (grow, to grow).
