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【多选题】
活塞销与活塞销座连杆小头的连接方式,一般有:A.
全支承式
B.
非全支承式
C.
式
D.
半浮式
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皮皮学刷刷变学霸
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【单选题】This temperature is an indication of the amount of fuel burnt in the cylinder concerned and , in general , temperature of all the cylinders should be---- with each other
A.
in different
B.
the same
C.
in close agreement
D.
in different agreement
【简答题】The ice melted ____ at this temperature. A) very fastly B) most fastly C) fastly D) fast
【单选题】The graph shows how the activity of an enzyme varies with temperature. What is the best or optimum temperature for this enzyme and at what temperature is the enzyme not working?
A.
best:30 ° C ;not work:0 ° C
B.
best:30 ° C ;not work:60 ° C
C.
best:50 ° C ;not work:0 ° C
D.
best:50 ° C ;not work:60 ° C
【单选题】During a heating process, the temperature of an object rises by 20 °C . This temperature rise is equivalent to a temperature rise of
A.
36 R
B.
36 K
C.
52 o F
D.
293 K
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