液压支架初撑力不低于规定值的（）
A、70%
B、80%
C、90%
参考答案：B
—There is a hole in your bag?
—I know. I’m going to have it __________.
A．mend
B．mending
C．mended
D．to be mended
按脱硫剂的种类划分，FGD技术可分为哪几种？
