皮皮学，免费搜题
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【简答题】
黏性流体在静止时有无剪应力？理想流体在运动时有无剪应力？若流体在静止时无剪应力，是否意味着他们没有黏性？
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皮皮学刷刷变学霸
举一反三
【单选题】As the economy is getting better and better，there are more and more jobs _______．
A.
valuable
B.
available
C.
previous
D.
convenient
【单选题】At the starting stage, the EOL will get information from______.
A.
all the Web sites available
B.
Databases built up by its creators
C.
Nonscientist with specialized knowledge
D.
the existing scientific databases
【单选题】That way of living is______to people in this small part of the country.
A.
specific
B.
available
C.
peculiar
D.
particular
【单选题】. There were no tickets _____ for Friday’s performance.
A.
preferable
B.
possible
C.
considerable
D.
available
【简答题】Computers are helpful because they offer a wide range of functions and services that are not available anywhere else. There are four main uses: word processing, Internet/ communications, digital video...
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