According to SOLAS, emergency steering drill should be carried out______ at least.(1.0)
A.once a month B.once every three months C.once every two months D.once every six months正确答案B
According to SOLAS, emergency steering drill should be carried out______ at least.(1.0)
A.once a month B.once every three months C.once every two months D.once every six months正确答案B
