计算机中带符号数的表示通常有原码、补码和 ____ 三种方式,其中 ___表示方式对于正0和负0的表示相同。

计算机总线可分为三种___总线、___总线 、 ___ 总线 。

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

Either he or I ______to the airport.

计算机系统可分为硬件系统和软件系统，其中软件系统主要由 ______ 组成。

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．

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

Hurry up, or you ______ catch the train.

目前网上支付系统可分为三种,其中不包括________。