喷射混凝土与围岩黏结力要求Ⅳ类及其以上围岩不低于( )MPa。
A.0.5B.0.8C.1.0D.5
参考答案:B
One of the advantages with the new tool is that it is users ____. Users can handle it with less effort and
more convenience.
A. friendly
B. good
C. well
D. pleased
工资指导线在制定时应遵循哪些原则