Generally speaking, suction heads require to be （） for high speed or large capacities than for low speed or small capacities.

It’s polite to keep our voice down in public.

Believe it or not, when first (introduce) ____ to Europe, tomato was thought to be poisonous.

Developed countries, like the US, have moved the some manufactures to the developing countries. Is it true or not? （）

In deciding to detain a ship or not, the PSCO would better not（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

Q3: Do you think it’s better for staff to receive written or oral feedback on their performance? (Why?/Why not?)

It is customary in shipping practice to quote freight rates（）weight or measurement,ship’s option.

Never（）the lifeboat or lifecraft disengaging locks or hydrostatic release gears because it can cause them to fail to function.

Never（）the lifeboat or lifecraft disengaging hocks or hydrostatic release gears because it can cause them to fail to function.

（）refers to a word or expression that is prohibited by the “polite” society from general use.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。