问题
多项选择题
架空送电线路铁塔遭受雷电击后跳闸,雷电流做如下分流,以下哪几种说法不,正确?()
A.全部沿地线向前和向后分成二路前进
B.一部分沿铁塔身经接地电阻入地,其余沿地线分流
C.约三等分,分别沿地线、导线、塔身泄出
D.约三等分,分别沿地线、导线、对地电容泄入大地
答案
参考答案:A, B, D
架空送电线路铁塔遭受雷电击后跳闸,雷电流做如下分流,以下哪几种说法不,正确?()
A.全部沿地线向前和向后分成二路前进
B.一部分沿铁塔身经接地电阻入地,其余沿地线分流
C.约三等分,分别沿地线、导线、塔身泄出
D.约三等分,分别沿地线、导线、对地电容泄入大地
参考答案:A, B, D
选词填空,并注意词形变化。 | |
2. The boy _____ some sentences with the new words he had learnt those days. 3. I don't watch TV. I read books _____. 4. How do we _____ our problems? 5. Tim _____ his father very much. 6. Does the house _____ your mother? 7. Peter _____ his classmates. 8. They _____ their friendship after the quarrel. 9. _____ drugs. They are dangerous. 10. Please help me _____ my bike. |