__ is over 1000.[ ] A. A number of worke_爱下问搜题

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问题选择题

__ is over 1000.[ ]

A. A number of workers

B. the number of workers

C. a number

答案

答案：B

选择题

.Gold is similar _________colour _______brass.

A. in; in B. to; to C.in; to D at; to

问答题简答题

简述酶法通风回流制醋在操作中的注意事项。