STCW规则分为A、B两部分,A部分为(),B部分为()。
A.强制性规定/强制性规定
B.强制性规定/建议和指南
C.建议和指南/强制性规定
D.建议和指南/建议和指南
参考答案:B
The bed ____wood ____three separate parts.
A.is made from; is made up of
B.made by; is made with
C.made of; is made of
D.is made up of; is made by
试述破冰爆破应遵守的事项有哪些。