判断题

地下水按照埋藏条件分为孔隙水、裂隙水和岩溶水。
正确
错误

答案：错误

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单项选择题

测量衍射斑点间距时，应该测量靠近中心斑点的几个衍射斑点至中心斑点的距离。

A．对
B．错

单项选择题

A good arrangement for a manuscript form (文稿格式) should leave a margin (空白) on each side, about two centimeters at both the top and the bottom, and .

A．one and a half centimeters on both the left and the right.
B．two and a half centimeters on both the left and the right.
C．two centimeters on both the left and the right.
D．one centimeter on both the left and the right.