经过水联运后的甲醇循环水含量很高，因此要尽早投用甲醇水精馏塔。
A. 正确
B. 错误
A cargo of refrigerated fruit is packed in crates with transverse members dividing the crate in two equal parts. Which statement is TRUE?（）
A. The cargo block should be tightly packed if the cargo is suitably chilled upon delivery to the vessel
Both sides of each crate must be checked for the temperature and the appearance of the fruit
C. The cargo block should be stowed with air channels built throughout the stowed cargo
D. The crates should NEVER be stowed brick fashio
下列分组方法中属计量资料分组的是（）
A. 按工作满意度分组
B. 按血压高低分组
C. 按疾病类别分组
D. 按学历高低分组
Which of the following statements is true concerning centrifugal pumps?（）
A. They are particularly suited for pumping high viscosity fluids
B. They are started with the discharge valve opened
C. The flow of liquid is developed by imparting energy due to the rotation of an impeller
D. They are always mounted in a horizontal positio
微信支付 
支付宝支付