各种剪切设备上剪刀、下剪刀间都有间隙要求,间隙过小时,会使材料断裂部分挤坏,使剪床()增加。
A、剪速
B、剪切力
C、负荷
D、振动
参考答案:C
Now an increasing number of middle school students go abroad for further study at their own ________, trying hard to realize their dreams.
A.price
B.cost
C.expenses
D.pay
设备工程设计合同履行中须变更设计方案的,应由()具体实施。
A.业主
B.监理单位
C.委托方
D.设计方