眼球内细小玻璃碎片属于()
A．不透性异物
B．半透性异物
C．透光性异物
D．金属性异物
E．磁性异物
参考答案：B
— Life now is not so easy as it ___________be, do you think so?
— Yes. I ___________ working seven days a week to get more pay.
A．used to; used to
B．was used to; used to
C．used to; am used to
D．was used to; am used to
上山施工倾角大于（）时，在耙装机司机前方必须设护身柱或者挡板，并在耙装机前方增设固定装置。倾斜井巷使用耙装机时，必须有防止机身下滑的措施。
A.20°
B.22°
C.24°
D.26°
