列车施行常用制动时,单阀缓解机车制动时,每次不得超过()kPa。
A.20
B.30
C.40
D.50
参考答案:B
Everything was placed _______ where he wanted it for the party, with which he was very satisfied.
A.gradually
B.entirely
C.officially
D.exactly
下列属于不完全骨折的是
A.螺旋骨折B.嵌插骨折C.压缩骨折D.凹陷骨折E.裂缝骨折