防护栏杆必须自上而下用安全立网封闭，或在栏杆下边设置严密固定的高度不低于( )的挡脚板或 40cm 的挡脚笆。
C
暂无解析
Welookforwardto______thegoodsinthefourthquarter.
We___youforthespecialofferyousendus.()
Beforethe16thcentury,Latinwastaughtandlearnedfor____________.
名词解释：offer
Thefactory_______we’llvisitnextweekisnotfarfromhere.
