你能帮帮他们吗
they are playing the baseball 还是they are playing baseball
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某种汽车购车费用是10万元,每年使用的保险费、养路费、汽油费共计约0.9万元,年维修费第一年是0.2万元,以后逐年递增0
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by还是in?If it is raining when you get up in the morning,it ca
1年前
滑轮与绳子张力问题如果滑轮两边用绳子各挂着一个质量为m1 m2 的物体,绳子与滑轮是相对静止的,那么在m1 上升加速 m
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英语翻译Something pulled me back,voice of reason I forgot I had
1年前