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【单选题】
金属活塞测量变换器，由于（），所以它在环境温度变化范围较大时仍能保持较高的计量准确度。A.
金属活塞的加工精度高，它和缸套间的间隙变化小
B.
设计精密
C.
活塞是金属材料，它的膨胀系数很小
D.
保温设计好
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皮皮学刷刷变学霸
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【单选题】I would have paid _____ for the dress if the sales girl had insisted, because I really wanted it. [ ]
A.
as much twice
B.
twice as much
C.
twice more than
D.
more than twice
【单选题】Ashley bought a new pair of jeans. When she walked out of the store, she thought, “I got such a great deal; I would have paid $40 more for these jeans!” This best represents the concept of:
A.
. consumer surplus.
B.
. producer surplus.
C.
. total surplus.
D.
. equilibrium.
【单选题】— Do you regret spending 500 dollars on the overcoat? — No, I would have paid _____ if the shop owner had insisted. [ ]
A.
twice as much
B.
twice as many
C.
much as twice
D.
many as twice
【单选题】_________ 科威特宣布独立时,伊拉克拒不承认,并陈兵边界,企图武力占领科威特,只是因遭到英国和其它阿拉伯国家的反对而未能如愿。
A.
1951年
B.
1961年
C.
1971年
D.
1981年
【单选题】I would have paid ________ for my car if the salesman had insisted, because I really wanted it.
A.
much twice
B.
twice as much
C.
times two
D.
as much twice
【单选题】I would have paid _____ for my car if the salesman had insisted, because I really wanted it.
A.
as much twice
B.
much twice
C.
twice as much
D.
two times
【简答题】数控机床上以某一进给速度加工圆弧时，当伺服系统两轴的增益相同时，加工圆弧的半径愈大，则轮廓误差______。
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