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【简答题】
.铰链四杆机构具有急回特性时其极位夹角θ值 ,对心曲柄滑块机构的θ值 = , 所以它 急回特性,摆动导杆机构 急回特性。
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反馈参考答案：
举一反三
【简答题】某车间30个工人看管机器数量的资料如下： 5 4 2 4 3 4 3 4 4 5 4 3 4 2 6 4 4 2 5 3 4 5 3 2 4 3 6 3 5 4 根据以上资料编制变量分配数列。
【简答题】阅读理解 Do you know the story about Vince? It was a true story. Vince was an English boy and he was eight years old. He didn't like soap or water. Three or four times a day his mother said to him, “Vince...
【简答题】Mike was a small boy,and he didn't like washing his hands.Every day his mother said to him: 'Mike,your hands are very dirty again.Go and wash them.'But Mike never washed them well.He only put them in...
【单选题】His hands are very _________ because of hard work.
A.
coarse
B.
crude
C.
clean
D.
rude
【简答题】A．NH 4 Cl B．NH 4 HSO 4 C．CH 3 COONH 4 D．NH 4 HCO 3
【单选题】在华为交换机中设置接口为静态访问模式的命令是( )。
A.
[SW1-G0/0/1] switchport mode access
B.
switchport mode trunk
C.
port link-type access
D.
port link-type trunk
【单选题】The very thought of his cold clammy hands gives me a feeling of repulsion , because they are very ____.
A.
clean
B.
delicious
C.
unpleasant
D.
dirty
【多选题】公约没有对缔约国表示同意的书面形式的类型作任何限制,实践中主要有以下几种形式:
A.
事先在与投资者的投资协议中约定
B.
在东道国的外资立法中作出规定
C.
在投资保护协定中对此作出规定
D.
争端发生后与投资者达成合意
【单选题】Tom's hands are very dirty. He __ his car for the whole morning.
A.
has repaired
B.
was repairing
C.
has been repairing
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