采煤工作面遇褶曲时，炮眼应（）方向打。
A.逆褶曲
B.顺褶曲
C.与褶曲方向成25°角
D.与褶曲方方向成45角°
参考答案：B
—Could you tell me how to remember new words quickly?
—Yes,I think a __________ tree can help you a lot.[ ]
A. grammar
B. equation
C. punctuation
D. vocabulary
从哪几个方面对零售服务差距进行弥补？
