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【单选题】
在凸轮机构中,通常作为主动件的是( )。
A.
凸轮
B.
从动件
C.
机架
D.
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举一反三
【单选题】It was the first time that I ______ Jackson’s songs.
A.
have listened
B.
have listened to
C.
had listened to
D.
had listened
【单选题】Had you listened to the doctor, you _______ all right now.
A.
are
B.
would be
C.
were
D.
would have been
【单选题】___ you ___ to the 6:30 broadcast? [     ]
A.
Have-listened
B.
Did-listen
C.
Had-listened
D.
would-listen
【单选题】从编号为1~50的50枚最新研制的某种型号的导弹中随机抽取5枚来进行发射实验,若采用每部分选取的号码间隔一样的系统抽样方法,则所选取5枚导弹的编号可能是
A.
5,10,15,20,25
B.
3,13,23,33,43
C.
1,2,3,4,5
D.
2,4,6,16,32
【单选题】--Did you hear something? --No. I ______ but I ______ anything at all.
A.
listened; have heard
B.
have listened; hear
C.
am listening; hadn’t heard
D.
was listening; couldn’t hear
【判断题】如图所示的回路,若马达在重物的重力作用下发生超速运转时,右侧油路由于背压减小,使平衡阀 2 阀口关小以消除超速现象。
A.
正确
B.
错误
【单选题】投资者应当在一定基础上,审慎决策,独立承担投资风险。这些基础条件不包括()
A.
了解产品
B.
了解服务情况
C.
了解机构建立的目的与宗旨
D.
听取经营机构适当性意见
【判断题】如图所示的回路,若马达在重物的重力作用下发生超速运转时,左侧油路由于供油不及而使压力下降,换向阀3位于下位可使右侧油路油液流入左侧油路以消除超速现象。【图片】
A.
正确
B.
错误
【判断题】承力索中心锚结一般采用GJ-70钢绞线作为锚结绳,一般由三跨组成。
A.
正确
B.
错误
【单选题】Had you listened to the doctor, you ______ all right now.
A.
are
B.
were
C.
would be
D.
would have been
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