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一個(gè)簡(jiǎn)單的考題考倒一大片! |
點(diǎn)評(píng)
我認(rèn)為答案應(yīng)該是z2公轉(zhuǎn)一圈,,自轉(zhuǎn)兩圈,,你認(rèn)為是3圈,我想應(yīng)該是你把題中“z1固定不動(dòng)”理解成了“z1是可以自轉(zhuǎn)的‘,。
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