简述垂直钻孔的优点。
参考答案：
适用于各种地质条件的深孔爆破；钻垂直深孔的操作技术比倾斜孔容易；钻孔速度比较快。
A．光电效应
B．光的干涉
C．光的衍射
D．光的色散
The girl was made to ______ a man she didn’t like at all.
A．get married
B．marry with
C．marry
D．be married with
