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【单选题】
Which of the following statements concerning butterfly valves is correct?
A.
Special tools are required for lapping or grinding
B.
It is impossible to throttle flow with a butterfly valve
C.
To close the valve, it is only necessary to turn the handle a quarter of a turn
D.
The butterfly valve should never be used in a freshwater system
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参考答案:
举一反三
【判断题】CRH5型动车组牵引电机采用轴悬式。
A.
正确
B.
错误
【单选题】根据UCP 500的规定,可转让信用证只能转让( )。
A.
1次
B.
2次
C.
3次
D.
4次
【判断题】冬季施工措施中在混凝土的拌制中,可以直接把水、骨料以及水泥进行加热/
A.
正确
B.
错误
【单选题】测量脉冲电压(尖脉冲)的峰值应使用:
A.
交流毫伏
B.
直流电压表
C.
示波器
D.
交流电压表
【单选题】Which is claimed to be one of world's biggest and best-equipped conservation centers for cultural relics.
A.
The Hall of Embodied Treasure
B.
The Palace Museum
C.
The Hall of Supreme Harmony
D.
The Hall of Central Harmony
【单选题】测量脉冲电压(尖脉冲)的峰值应使用( )。
A.
交流毫伏表
B.
直流电压表
C.
示波器
D.
交流电压表
【判断题】The Hall of Embodied Treasures was an exhibition hall to introduce the Forbidden City’s history as a museum.
A.
正确
B.
错误
【单选题】(2013年7月)2.中国有句俗话,“望山跑死马”。期望自己一觉醒来发现理想已经实现,这种便宜事是不可能出现的。这说明,理想的实现具有
A.
自发性
B.
简易性
C.
长期性
D.
偶然性
【简答题】I don't know who she is. I don't know what she wants. ( and )
【单选题】Which is the biggest and most important piece of architecture in the Forbidden City?
A.
The Hall of Embodied Treasures
B.
The Hall of Supreme Harmony
C.
The Hall of Central Harmony
D.
The Hall of Preserving Harmony
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