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【单选题】
下列关于直接材料用量差异计算的说法中，正确的有______。A.
直接材料用量差异=(实际用量-实际产量下标准用量)×标准价格
B.
直接材料用量差异=(实际用量-实际产量下标准用量)×实际价格
C.
直接材料用量差异=(实际用量-标准产量下标准用量)×标准价格
D.
直接材料用量差异等于实际用量与标准价格的乘积，减去实际产量下标准成本总额
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【单选题】It was _________ difficult work ________ nobody can do it.
A.
so, that
B.
such a that
C.
such , that
D.
so a, that
【单选题】What does the man mean?
A.
Nobody can be the best.
B.
Do as well as you can.
C.
It's difficult to do something perfectly.
【单选题】The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the ______.
A.
horizontal parallax decreases
B.
observer's height above sea level increases
C.
humidity of the atmosphere decreases
D.
altitude of the body decreases
【单选题】Whats does the man mean?
A.
Nobody can be the best.
B.
Do as well as you can.
C.
It’s difficult to do something important.
D.
Its impossible to do something important.
【单选题】When did the woman know Sam?
A.
When she worked.
B.
When she was young.
C.
When she married.
【单选题】It was _________ difficult work _________ nobody can do it.
A.
so, that
B.
such, that
C.
such a, that
D.
so a, that
【单选题】Do you believe some special dogs can do things ______ man?
A.
as good as
B.
so good as
C.
as well as
D.
so well as
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