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【单选题】
矩形截面弯曲变形时,横截面上的切应力沿高度方向( ).A.
（三角形）线形分布
B.
抛物线分布
C.
均匀分布
D.
不规则分布
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反馈参考答案：
举一反三
【单选题】________ late. It's your first day to work. [ ]
A.
Don't to be
B.
Don't be
C.
Not be
D.
Be not
【单选题】_____ your homework. You must see a doctor now. [ ]
A.
Do
B.
Don't
C.
Don't to do
D.
Don't do
【单选题】______ go out for a walk after supper? [ ]
A.
Why not
B.
Why don't
C.
Why not to
D.
Why don't to
【单选题】___ in bed. It's bad for your eyes. A. Not to read B. Don't read C. Don't to read D. Not read
A.
Not to read
B.
Don't read
C.
Don't to read
D.
Not read
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