a number of,numbers of,large number of区别这有一道题:——foreign visitors were taken to the industrial exhibition,where they saw many new profuctsA a number ofB numbers ofC many aD large number of它们四个有什么区别啊

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a number of,numbers of,large number of区别这有一道题:——foreign visitors were taken to the industrial exhibition,where they saw many new profuctsA a number ofB numbers ofC many aD large number of它们四个有什么区别啊
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a number of,numbers of,large number of区别这有一道题:——foreign visitors were taken to the industrial exhibition,where they saw many new profuctsA a number ofB numbers ofC many aD large number of它们四个有什么区别啊
a number of,numbers of,large number of区别
这有一道题:
——foreign visitors were taken to the industrial exhibition,where they saw many new profucts
A a number of
B numbers of
C many a
D large number of
它们四个有什么区别啊

a number of,numbers of,large number of区别这有一道题:——foreign visitors were taken to the industrial exhibition,where they saw many new profuctsA a number ofB numbers ofC many aD large number of它们四个有什么区别啊
a number of 是一些 几个 其余两个是许多,大量