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【单选题】
平面任意力系的平衡方程最多可含有（ ）个投影方程。A.
1
B.
2
C.
3
D.
4
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反馈参考答案：
举一反三
【单选题】—_____ Peter have eggs for breakfast? —No, he _____ eggs． [ ]
A.
Does; like
B.
Does; doesn't like
C.
Do; like
D.
Do; don't like
【简答题】单项选择。 ( )1. A: did you go yesterday? B: I went to the library. A. When B. Where C. What D. How ( ) 2. Our English teacher taught us many ways. A. on B. in ...
【单选题】乘坐国内航班的旅客应在客票上列明的航班规定时间起飞前( )分钟到达指定机场,凭客票及本人有效身份证件办理乘机手续。
A.
60.0
B.
90.0
C.
120.0
D.
40.0
【简答题】Peter doesn't like eating chocolate． It tastes too s _________ ．
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