【名词&注释】
探测器(detector)
[单选题]绞缆机绞缆速度一般为()m/min。
A. 10-15
B. 15-30
C. 30-50
D. 大于50
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举一反三：
[单选题]A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.
A. increasing the linear velocity of the exhaust gases
B. changing directions of exhaust gas flow
C. decreasing the temperature of the exhaust gases
D. accelerating the exhaust gas through a reduced size orifice
[单选题]所有梯道、走廊和起居处所内脱险通道要求的感烟探测器应在烟密度超过______每米减光率之前动作。但在烟密度超过_____每米减光率之前不应动作。
A. 10.5％/2％
B. 11.5％/2％
C. 12.5％/2％
D. 13.5％/3％
[单选题]苯的特性具有()。
A. 易燃
B. 毒性强
C. 易燃、易挥发、毒性强
[单选题]The difference between measured and desired values is called
A. make-up
B. desired value
C. deviation
D. set value
[单选题]Due to action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.
A. reciprocating
B. rotating
C. running
D. removing
[单选题]特急性颅内血肿是指受伤后______出现脑受压或脑疝症状。
A. 3小时
B. 3小时—3天
C. 3天—3周
D. >3周
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