Wehavehurriedallthewaytotheairport—theflightwascalledoffbecauseofthefoggyweather.A.mustn'tB.couldn'tC.needn'tD.wouldn't
We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.
A . mustn't B . couldn't
C . needn't D . wouldn't
C [ 考查情态动词。句意:我们本不必一路上都着急去机场的 —— 航班因为雾天被取消了。 needn't have done 表示 “
本不必做却做了 ” ,符合句意。 ]
为什么DP=(t-2)DE=4.应该DP=2t啊为什么当点P在线段DE上运动时,DP段的运动时间为( 2020-03-31 …
S J S Z T K D S M G Y C:W A N,Q B N G S N B Y G W 2020-04-06 …
____play soccer on the street.It's too dangerous. 2020-05-17 …
printf("\1\1Youareveryclever!\1\1\n\n");s\t%d:%d: 2020-05-17 …
在家庭、企业和政府的三部门经济中,国民经济恒等式可写作( )。 A.I=S B.I=S+(T-G)C 2020-05-21 …
已知有A,B,C,D,E,F,取值1,2,3,4,5,6;则S=|A-B|+|B-C|+|C-D| 2020-05-23 …
关系模式A的码是______。A.CB.(H,R)C.(H,T)D.(H,S) 2020-05-23 …
关系模式A的码是()。A.CB.(H,R)C.(H,T)D.(H,S) 2020-05-24 …
A.SB.S,(T),bC.(Sd(T)db)D.S,(T)Tds,b 2020-05-26 …
由v=ds/dt和a=dv/dt,怎么能够得到a=(d*d)s/d(t*t)式中(d*d)为d方, 2020-07-22 …