问题
多项选择题
造成电动机过负荷的原因主要有（）。
A.频繁启动
B.机械卡堵
C.电源电压低
D.启动时间长时，爆炸气浪将
答案
参考答案：A, B, C, D
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造成电动机过负荷的原因主要有（）。
A.频繁启动
B.机械卡堵
C.电源电压低
D.启动时间长时，爆炸气浪将
参考答案：A, B, C, D
| 完形填空。 |
| A London family were enjoying an unusual holiday in Iceland (冰岛) last month when things went very wrong. Anne and Ben Harding and their two children, Claire, 13, and Sam, 11, 1 died in freezing water. The accident happened while the Harding family were 2 a glacier (冰河) in a popular Icelandic beautiful place. 3 were walking along the edge of the ice when suddenly they fell 4 the ice into the freezing water. His father Ben heard a cry for help and ran towards 5 . "I found my wife and children in the ice water. And then my wife Anne just 6 below the surface (表面). It was terrible." Ben 7 his children from the water, but when he went to save his wife, he fell in, too, as he was trying to 8 in the ice. 9 , when he was in the water, he went all out to catch hold of Anne and pulled her 10 out of water. "Her face was blue. 11 was really frightening (恐怖的)". Anne spent three days in hospital there before the family 12 . And what are their plans for their next holiday? |
| ( )1. A. nearly B. hardly C. fully D. helplessly ( )2. A. swimming B. visiting C. reaching D. exploring ( )3. A. The children B. Anne C. The Harding family D. Anne and children ( )4. A. through B. off C. down D. to ( )5. A. the bank of the river B. the edge of the glacier C. the end of the glacier D. the end of the river ( )6. A. dropped B. swam C. sank D. cried ( )7. A. pushed B. pulled C. saved D. helped ( )8. A. help Anne B. jump into the water C. swim towards Anne D. jump across the hole ( )9. A. Luckily B. Strangely C. Excitedly D. Clearly ( )10. A. arm B. leg C. head D. face ( )11. A. That B. It C. She D. I ( )12. A. returned to Iceland B. returned from England C. returned to England D. returned from Europe |