Nobody knows how long and how seriously the shakiness（不稳定） of big businesses will （） down the economy.

“Knowing English” must mean knowing how to（）in English.

You intend to discharge medical or hazardous wastes ashore MARPOL annex V requires you to notify a receiving port or terminal in advance.How much advance notice require?（）

How do you decide whether a word should enter the students’ active or passive vocabulary?

How many years of experience do you have with deploying and maintaining a virtualization infrastructure using Microsoft desktop or server virtualization technologies?（）

How many years of experience do you have with deploying and maintaining a virtualization infrastructure using any desktop or server virtualization technologies?（）

英语“How’severything？”的含义是“（）”。

“Knowing English” must mean knowing how to（）in English.

How many years of experience do yo u have with deploying and maintaining a virtualization infrastructure using Microsoft desktop or server virtualization technologies?（）

How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。