Every spring, people often plant _____ t

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问题选择题

Every spring, people often plant _____ trees to make our city greener and more beautiful.

A. hundred of
B. hundreds of
C. two hundred of
D. two hundreds of

答案

答案：B

填空题

罗山董寨鸟类自然保护区，栖息鸟类______目和______科。

问答题简答题

广大煤矿职工的职业守则有哪几个方面？