喹诺酮类抗菌药的主要作用机制是（）。

氟喹诺酮类药物抗革兰阴性菌的作用机制是（）。

西南联大、西北联大是哪个时期我国著名的两所高等学校？（）

If a boy or a girl has grown up in a home with sharing tasks and decisions，he or she will probably______.

氟喹诺酮类药物的作用机制主要是（）

喹诺酮类抗菌药的主要作用机制是（）

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Duty is an act or a course of action that people ______you to take by social customs, law or religion.

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

OR指令的作用是: 。( )

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。