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【多选题】
运行中高压加热器出水温度下降的原因有A.
钢管水侧结垢，管子太多
B.
疏水水位上升，淹没钢管
C.
运行中负荷下降，蒸汽流量减少
D.
加热器进水温度较低
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【单选题】This pair of scissors__ _ __ sharper than that one.
A.
are
B.
have been
C.
is
D.
has been
【简答题】简述电能计量装置停电检查的前提与内容。
【简答题】One day a tailor in Duluth, Minnesota, was busy mending an old coat, repairing some holes and a place where it was torn, when he suddenly heard a low, threatening sound at his open door. He looked up ...
【单选题】Which of the following statements is INCORRECT?
A.
The United States is a country with varied origins.
B.
My mathematics are rather shaky.
C.
The Straits of Gilbraltar have not lost the strategic importance.
D.
One pair of scissors aren't enough.
【简答题】()是指企业的投资者按照企业章程或合同、协议的约定,实际投入企业的资本金。
【单选题】—What do you want to do for vacation? —I _______ my grandmother. [ ]
A.
visit
B.
am going to visit
C.
visited
D.
visiting
【单选题】One pair of scissors ____________ enough.
A.
isn’t
B.
aren’t
C.
haven’t been
D.
hadn’t been
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