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【多选题】
探头是超声成像设备的关键部件,其工作的物理基础是()。A.
多普勒效应
B.
正压电效应
C.
逆压电效应
D.
光电效应
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举一反三
【单选题】I have to get______ about the subject before I write the paper.
A.
a little more information
B.
a lot more informations
C.
a few more information
D.
more informations
【单选题】I have to get__________ about the subject before l write the paper．
A.
a little more information
B.
a lot more informations
C.
a few more information
D.
more informations
【单选题】The little girl painted one side of the paper green but _________ side black.
A.
the other
B.
the others
C.
another
D.
other
【单选题】In addition to paper books, what did the little girl make with paper at school?
A.
An animal
B.
A person
C.
A building
【简答题】阅读理解 One night when my wife was preparing dinner, our little son took a piece of paper to her which read: For washing the car...........................................$5.00 For my own bed this...
【单选题】You _______ an A on your term paper, but you quoted a little bit more from others' papers.
A.
should receive
B.
could have received
C.
would receive
D.
must have received
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