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问题 单项选择题

压力容器从工作压力上分四类，其中中压压力容器的压力范围为（）。

A.4.0MPa≤工作压力<10MPa

B.2.5MPa≤工作压力<16MPa

C.1.6MPa≤工作压力<10MPa

D.3.5MPa≤工作压力<16MPa

答案

参考答案：C

阅读理解

An advertisement
One of the finest buys on the market in Tara. Spacious home with large living room, separate 15-foot dining with built-in shelves, family room with fireplace, huge kitchen with lots of cabinets（柜厨）, big breakfast room, 2 baths, 4 huge bedrooms (one is separate and could be a playroom or offers a guest room with a separate entrance). There is a beautiful courtyard. Better than new with new air conditioners.
Call Lane Hitch (home) 926-6043.
49. Who might buy the house after reading the above advertisement?
A. Some young students.                  B. A couple with little money
C. A big rich family               D. A big poor family
50. What room has several possible uses?
A. The living room.               B. The bedroom.
C. The dining room.               D. The kitchen.
51. What is emphasized（强调）in the description of each room?
A. Floor.         B. Entrance.           C. Size.                 D. Windows.
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单项选择题

用万用表判别二极管的极性时，应使用万用表的（）档。

A.电压

B.电流

C.欧姆
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