(单选题)
装卸货之前,打开舱盖。()
AAfter loading and discharging, hatch covers will be opened.
BAfter loading and discharging, hatch covers will be closed.
CBefore loading and discharging, hatch covers will be opened.
DBefore loading and discharging, hatch covers will be closed.
正确答案
答案解析
略