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【单选题】
一容器内装有N1个单原子理想气体分子和N2个刚性双原子理想气体分子，当该系统处在温度为T的平衡态时，其内能为A.
( N 1+ N 2) [(3/2) kT +(5/2 ) kT ]
B.
(1/2) ( N 1+ N 2) [(3/2) kT +(5/2 ) kT ]
C.
N 1 (3/2) kT + N 2(5/2 ) kT
D.
N 1 (5/2) kT + N 2(3/2 ) kT
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【简答题】主要的胃肠激素有 、 、 、 四种。
【单选题】The young man s clothes were scattered about his room______.
A.
at will
B.
at random
C.
with a hurry
D.
at time
【多选题】当电气设备发生火灾时,要注意哪些,以下表述正确的有( )
A.
要立即将该设备的电源切断
B.
切断电源后按规定采取有效措施灭火
C.
牵引变电所要按规定配备消防设施和急救药箱。
D.
立即向供电调度汇报,经许可后将该设备的电源切断
【简答题】His bright clothes were not______a funeral. A．fit B．appropriate of C．appropriate for D．suit
【单选题】His clothes were _______ to the occasion.
A.
potential
B.
average
C.
considerable
D.
appropriate
【简答题】The Pathfinder When we found him, he was a sorry sight. His clothes were torn, his hands bleeding. Before we reached him, we saw him fall. He lay a moment. Then he pulled himself to his feet, walked u...
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