问题
单项选择题
在分层开采的煤层中进行回采时，首先开采的分层瓦斯涌出量（）。
A．小
B．大
C．不变
D．不一定
答案
参考答案：B
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在分层开采的煤层中进行回采时，首先开采的分层瓦斯涌出量（）。
A．小
B．大
C．不变
D．不一定
参考答案：B
根据短文内容，从A,B、C、D四个选项中，选出可以填人空白处的正确答案。  Look at this boy. 1 name is Nick. His 2 is May 1st. He was born in 1997. He is 3 years old. Jack 4 his friend. He is 5 English boy. They 6 students. They are in the same school. Miss Li is their 7 . She is 8nice teacher. She 9 them. They like 10, too.
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