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【简答题】
21世纪机械工程研究的重点领域有哪些?
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反馈参考答案：
举一反三
【简答题】The treasured books should be put in ________. A)built-in bookshelves B)freestanding bookcases C)hanging bookshelves D)glass cases
【单选题】What is the purpose of the relief valve of a cargo pump ________．
A.
Provides for the removal of vapors
B.
Allows two or more tanks to be filled at the same time
C.
Provides for the emergency shutdown of the pump
D.
Permits the return of cargo to the suction side of the pump
【单选题】The treasured books should be put in ______.
A.
built-in bookshelves
B.
freestanding bookcases
C.
hanging bookshelves
D.
glass cases
【单选题】Relief workers were shocked by what they saw.
A.
moved
B.
Touched
C.
Surprised
D.
worried
【简答题】A house of cards? Sounds unbelievable, doesn’t it? Not if the architect is 31-year-old Bryan Berg. He’s made a career out of building fantastic card houses, stadiums, capitols, castles — and the world...
【单选题】No freestanding fitment may exceed a height of ** meters or extend ___the boundaries of the site.
A.
by
B.
over
C.
beyond
D.
to
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