仓库管理和组织材料运输,都必须贯彻()的原则。
A.严肃、及时、准确
B.节约、及时、准确、严肃
C.及时、准确、安全、经济
D.及时、准确、安全、节约
参考答案:C
怎样进行叶轮给煤机的操作?
For determining the amount of chains used in anchoring operation,which one of the following factors wouldn’t be considered?().
A.selection of landmarks
B.character of sea bottom
C.strength of current and wind force
D.radius of ship swing to wind or tide