单项选择题

弥散性血管内凝血属于（）

A.血小板形态异常
B.血小板破坏障碍
C.血小板消耗过多
D.血小板数量正常
E.血小板生成障碍

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单项选择题

Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an __________.
A.engine support vibration isolator
B.detuner or viscous fluid damper
C.lightened crankshaft flywheel
D.spherically seated crankshaft bearing

A.
A.engine
B.detuner
C.lightened
D.spherically

单项选择题

欲取50ml 某溶液进行滴定，要求容积量取的相对误差≤0.1%，在下列量器中宜选用 ( )
A、50 ml量筒
B、50 ml移液管
C、50 ml容量瓶
D、100 ml量筒

A.1%，在下列量器中宜选用