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【判断题】
计入摩擦力时,蜗杆的圆周向力 F t1 和蜗轮的圆周向力 F t2 的关系为 F t1 =F t2 tan γ ( γ 为蜗)。A.
正确
B.
错误
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举一反三
【简答题】vi. 消灭,不见 (v__)
【简答题】1. What is George’s room number? 2. How much does the hotel charge
for a day? 3. Did George have meal in the
hotel? 4. How does George pay for the bill,
by cash or by credit card? 5. Why would Gorge l...
【简答题】Why would Gorge like to leave his luggage in the hotel until he is ready to leave?
【简答题】v____ vi. 消灭,不见
【简答题】Why would Gorge like to leave his luggage in the hotel until he is ready to leave?
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