自动调节器向手动调节器切换的方法有哪些?
参考答案:
1)自动通道电源故障时;
2)自动通道相位基准故障时(即自动通道PT二次开关都跳闸);
3)通过DCS人工操作切至手动通道。
蚯蚓的运动方式是 [ ]
A.奔跑
B.蠕动
C.行走
D.飞行
I can () her sudden friendliness; she wants me to look after her parrot while she is away.
A. work out
B. make out
C. see through
D. figure out