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【单选题】
膨胀压力是粘结性煤成焦的特征，可以使胶质体均匀地分布于煤料之间，有助于煤料的粘结作用，膨胀压力过大，对炉墙有损害，安全压力一般应小于（）。A.
5~10kPa
B.
10~15kPa
C.
15~20kPa
D.
20~30kPa
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【单选题】下面哪个是对断路器控制回路的基本要求 ( 1 )断路器操作机构中的合、跳闸线圈是按短时通电设计的,故在合、跳闸完成后应自动解除命令脉冲,切断合、跳闸回路,以防合、跳闸线圈长时间通电。 ( 2 )应具有防止多次合、跳闸的电气防跳措施。 ( 3 )断路器既可利用控制开关进行手动跳闸与合闸,又可由继电保护和自动装置自动跳闸与合闸。 ( 4 )应有反映断路器状态的位置信号和自动合、跳闸的不同的显示信号。
A.
123
B.
124
C.
234
D.
1234
【单选题】听力原文：M: How do you like the new physician who replaced Dr. Andrews? W: He may not seem as agreeable or as thorough as Dr. Andrews, but at least he doesn't keep patients waiting for hours. Q: What can ...
A.
Dr. Andrews has been promoted for his thoroughness.
B.
She disagrees with Dr. Andrews on many occasions.
C.
Dr. Andrews used to keep his patients waiting.
D.
She dislikes Dr. Andrews as much as the new physician.
【简答题】液压操动机构利用液体的（），以液压油为传递介质，将高压油送入工作缸两侧来实现断路器分合闸，是以（）驱动工作缸活塞带动触头进行分合操作。
【单选题】听力原文：M: How do you like the new physician who replaced Dr. Andrews? W: He may not seem as agreeable or as thorough as Dr. Andrews, but at least he doesn't keep patients waiting for hours. Q: What can ...
A.
She dislikes Dr. Andrews as much as the new physician.
B.
Dr. Andrews has been promoted for his thoroughness.
C.
She disagrees with Dr. Andrews on many occasions.
D.
Dr. Andrews used to keep his patients waiting.
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