在没有中心大孔的天井凿岩中,超过10m时须在爆破后()小时,方可进入作业。
A、16
B、18
C、20
参考答案:A
国民收入
As there is no direct steamer to your port, please amend the L/C ______."Transhipment allowed".
A. to let B. to cover C. to see D. to read