A、streak
B、term
C、plan
D、period
You’re () your time trying to persuade him, he will never join us.A、spendingB、losingC、wastingD、missing
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层流流动的Re数满足()。A、Re2000B、Re5000C、2000Re10000D、Re20000
You- re _s___________ out ,you need to relax.
You’re__________your time talking to him;he’ll never understand.A.spending B.wasting C.losing D.missing
1、下列缩略词中,那个单词中尾部的字母a所代表的内容其他不同?A.kindaB.wannaC.gottaD.gonna
1、下面哪一种状态是层流?A.Re﹤Re临界B.Re= Re临界C.Re﹥Re临界D.都不正确
下面哪一种状态是层流?()A.Re﹤Re临界B.Re= Re临界C.Re﹥Re临界D.不确定