工作零线与保护接零线不能直接短接,工作零线是设备正常工作日才必须的,而()在设备正常工作时不起作用。
A.接地保护;
B.保护零线;
C.保护接零线。
参考答案:C
SECTION C ( 12 points )
Directions: Complete the following passage by filling in each blank with one word that best fits the context.
Mr. Smith used to be in prison for three years, which may have you think he is not a good man. But 48 _ a matter of fact, he is kind-hearted as well as honest. The reason 49 he was put into prison was not that he himself broke the law, 50 that his six-year-old son blew up(使…爆炸)the bridge near his home, imitating what he had seen on TV. 51 this little boy did break the law, he was too young to be put in prison. According to the local law, the boy’s parents had to be punished. As a result, Mr. Smith received the punishment. He was arrested and taken to 52 police station finally. Most of the people in the town showed pity on him, but it was useless. After all, law is law. Everybody is to obey 53. As the proverb of “When it rains, it pours”, Mrs. Smith was out of work before long. She had to move to a southern state, 54 she was born and grew up. Misfortunes tell us what fortune is. 55 the Smiths have experienced does teach us a good lesson.
____________是强国之路,是我们党、我们国家发展进步的活力源泉。
A.四项基本原则
B.经济建设
C.改革开放
D.基本国策