题目:
过流保护按时限特性分为定时限过流保护和无时限过流保护。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:C
过流保护按时限特性分为定时限过流保护和无时限过流保护。
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下面是错误答案,用来干扰机器的。
参考答案:C
阅读理解。 | ||||||
Read the following six advertisements and answer the questions for each of them. Advertisements (广告) | ||||||
| ||||||
1. The Browns are looking for a new house. Mr. Brown wants to live in the north of town near his workplace. Mrs. Brown wants a house with four bedrooms. The Browns' children don't care what the house is like as long as (只要) the garden is big enough. Why didn't the Browns buy the house in the advertisement? | ||||||
[ ] | ||||||
A. it was on the wrong side of the town. B. There weren't enough bedrooms. C. There was no dinning room. D. The garden was too big. | ||||||
2. Man: Why don't we rent (租、借) one of the Seaview Holiday Flats for our holiday, Mary? They sound just as good as the Seaview Hotel, and it would be much cheaper. Mary: There's one big difference between the holiday flats and the hotel. The hotel would be much less work. Why would Mary rather stay at the hotel? | ||||||
[ ] | ||||||
A. They wouldn't have to cook. B. It's not so expensive. C. She would enjoy the beautiful gardens. D. It's near the sea. | ||||||
3. Tom: There's a new football team standing in the village, Mum. I'm old enough to play in it. We stop school at half past three, so I'd have plenty of time. Mum: Well, I suppose you could do your homework later. But look, Tom, you haven't read the advertisement carefully. You can't possibly play for this team. Why can't Tom play for the new football team? | ||||||
[ ] | ||||||
A. He's not old enough. B. Tom hasn't read the advertisement carefully. C. School stops too late. D. He has to do his homework | ||||||
4. Man: I'm looking for a room to rent. It doesn't matter how big it is. I don't care what colour the walls are or how old the furniture (家具) is. I've got to study for my exams, so the house must be quiet and near the school. Girl: There are some advertisements for rooms in the paper. What about this one? Man: Yes… Yes… that's all right. Oh, dear, no, I don't think it would do. What's wrong with the room in the advertisement about rooms? | ||||||
[ ] | ||||||
A. It's too small. B. The walls are the wrong colour. C. The man likes old furniture better. D. It's too noisy. | ||||||
5. Ann has always wanted to work in a restaurant. She thinks they're exciting places. It's hard work but she isn't lazy. You have to work on Saturdays and Sundays but you get other days off. It's not very well-paid, but who cares about money? Why does Ann want to get the job in the restaurant? | ||||||
[ ] | ||||||
A. It's an easy job. B. The pay is good and the food is free. C. She thinks it would be fun. D. You get long holidays. |
当前,网络谣言已经成为社会和谐稳定的一大隐患。防止网络谣言[ ]
①政府部门应依法严惩网络谣言制造者
②各大网站关闭所有网页和微博
③广大网民自觉抵制与举报网络谣言
④网吧要监控网民,不让他们自由发表言论
A.①②
B.②③
C.①③
D.②④
以下说法正确的是
A.整复手术对老年病员无必要进行
B.面部整复手术与年龄大小无关
C.面部整复手术与生长发育无关
D.后天性面部畸形和缺损,年龄越小手术效果越好
E.面部整复手术最好在生长发育成熟后进行
纺织企业的纺纱、织布,属于()过程。
A.基本生产
B.辅助生产
C.生产技术准备
D.生产服务
滚筒式筛砂机由机架、滚筒、罩壳、()、进料端盖和出料斗组成。