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【单选题】
以下关于铝及铝合金说法中错误的是( )。
A.
L01表示工业纯铝牌号,主要用于特殊化学机械、电容器片和科学研究场合
B.
铝合金比纯铝的强度高几倍,并保持纯铝的特性
C.
铝铜合金可用于制造发动机汽缸头与活塞
D.
ZALSi12表示硅含量为1.2%的铸造铝合金
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举一反三
【单选题】There are a lot of classes at the .
A.
classes
B.
school
【单选题】Although there are a lot of difficulties on the way of brand development, Chinese enterprises will overcome them and achieve success at the end.
A.
Y
B.
N
C.
NG
【判断题】湍流混合层是边界层中,由于湍流作用,位温(饱和条件下,假相当位温)趋于常数的气层。
A.
正确
B.
错误
【简答题】A.There are a lot of excitement and intrigue in his stories. B.People always keep up with the Joneses. C.People are richer than before and can afford the latest books. D.All of the above.
【单选题】Look! There are a lot of children on the playground. [     ]
A.
play
B.
playing
C.
to play
D.
are playing
【单选题】What's the woman's opinion about Cairo?
A.
There are a lot of interesting places to go.
B.
She likes it very much.
C.
Some of the places, though not many, are worth a visit.
【单选题】假相当位温的缩写是( )
A.
QV
B.
RH
C.
DIV
D.
PTE
【单选题】同一末饱和湿空气块的位温θ和假相当位温θse的关系是(______)。
A.
θs e > θ
B.
θs e = θ
C.
θs e θ
D.
无法判断
【判断题】在干绝热和湿绝热过程中,假相当位温不是保守量。
A.
正确
B.
错误
【单选题】What can be inferred from this passage?
A.
There are a lot of people like Ron.
B.
There is few companies in this county.
C.
People in this county do not want to work.
D.
The county is far away from major business center.
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