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【单选题】
对于()当量直径等于四倍的流通截面积除以润湿周边。A.
圆形管
B.
非圆形管
C.
矩形管
D.
直管
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【简答题】According to Prof. Bhushan, we could have stain-resistant window glass by using super- smooth polymer sheets, which are produced by _________.
【单选题】According to the passage, ______ .
A.
investing in the housing market will certainly be profitable
B.
the housing market once crashed in the late 1980s
C.
no market is as certain as the housing market
D.
many people would buy a car earlier than buying a house
【简答题】三基色的选择不是唯一的，彩色电视中选择的三基色是 () 、 () 、 () 三色。
【简答题】第二代计算机采用的电子器件是______。
【简答题】第四代计算机采用的电子器件是______。
【单选题】According to Prof Prentice, what are the reasons for the change in our shape?
A.
We eat too much and refuse to do physical exercises.
B.
High-energy foods are easy to get and technology develops fast.
C.
High-energy foods are the main diet and we use technology.
D.
High-energy foods are easy to get and we consume less energy.
【单选题】According to Prof. Snow, which of the following is CORRECT?
A.
Children become bilingual in learning a second language.
B.
Children have difficulties in maintaining two languages.
C.
Adult second-language learners become monolingual in learning a second language.
D.
Adults are more likely to achieve native-like proficiency to learn a second language.
【简答题】carefully research 认真研究
【简答题】第四代计算机采用的电子器件是______。
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