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【判断题】
稳定单质在298.15K时的【图片】和【图片】均为零。A.
正确
B.
错误
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举一反三
【单选题】Try new sports, games, and other activities ________new foods.You'll grow stronger, play longer, look and feel better! [ ]
A.
such as
B.
as well as
C.
or
D.
as well
【单选题】In____ scavenging he incoming air is directed upwards and the exhaust gases travel down and out of the exhaust ports at the opposite side of the cylinder.
A.
cross
B.
loop
C.
aspirate
D.
uniflow
【单选题】The crankcase of many diesel engines are kept under a slight vacuum by the _____.
A.
scavenging action of the piston
B.
piston type vacuum pump taking suction off a differential manometer
C.
gland exhausting manometer
D.
crankcase exhaust fan
【简答题】uniflow scavenging
【单选题】In ____ scavenging the incoming air is directed upwards and the exhaust gases travel down and out of the exhaust ports at the opposite side of the cylinder.
A.
cross
B.
aspirated
C.
Loop
D.
uniflow
【单选题】In ________scavenging the incoming air is directed upwards and the exhaust gases travel down and out of the exhaust ports at the opposite side of the cylinder.
A.
cross
B.
loop
C.
aspirate
D.
Uniflow
【简答题】管理者是干什么的 蒋华是某新华书店邮购部经理。该邮购部每天要处理众多的邮购业务,在一般情况下,登记订单、按单备货、发送货物等都是由部门中的业务人员承担的。但在前一段时间里,接连发生了多起 A 要的书发给了 B , B 要的书却发给了 A 之类的事,引起了顾客的极大不满。今天又有一大批书要发,蒋华不想让此类事情再次发生。 请问:他应该亲自核对这批书,还是仍由业务员们来处理?为什么?
【单选题】“Loop”, “uniflow”, “crossflow”,and “return-flow” are terms used to describe various types of_____.
A.
control air circuits
B.
supercharging
C.
turbochargers
D.
scavenging
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