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【多选题】
机械原理课程研究的主要内容?A.
机械零件设计
B.
机构分析
C.
机构设计
D.
机械系统方案设计
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反馈参考答案：
举一反三
【简答题】请同学们写出两个具有轴对称性的汉字（ ）。
【简答题】点【图片】到直线【图片】的距离为
【简答题】according to the statement " • If you feel painand scratchiness in your throat and have difficulty swallowing, you probablyhave a sore throat. " what are the symptons of having a sorethroat?A. have d...
【简答题】点【图片】到直线【图片】的距离
【简答题】请同学们写出两个具有轴对称性的汉字______．
【多选题】according to the statement " • If you feel pain and scratchiness in your throat and have difficulty swallowing, you probably have a sore throat. " what are the symptons of having a sore throat?
A.
have difficulty swallowing
B.
feel pain in your throat
C.
feel scratchiness in your throat
D.
feel sorrow and depressed
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