【名词&注释】
急性心肌梗塞(acute myocardial infarction)、安全阀(safety valve)、空压机(air compressor)、血性休克(hemorrhagic shock)
[单选题]空压机通常在( )后面设安全阀。
A. 第一级
B. 最末级
C. 每一级
D. A或B或C
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举一反三：
[单选题]急性出血性休克(hemorrhagic shock)的常见原因是______引起的。
A. 急性心肌梗塞
B. 机体遭受大量细菌侵袭
C. 急剧大量地出血
D. 药物过敏等变
[单选题]The bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason is
A. the rotate speed fluctuation
B. the ventilation tube clogged
C. the main engine accelerate so fast
D. stormy waves
[单选题]UMS stands for
A. ultra much space
B. universal medium system
C. unit machined space
D. unattended machinery space
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