题目内容

操作系统出现于第几代计算机中?

A. 第一代计算机
B. 第二代计算机
C. 第三代计算机
D. 第四代计算机

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Our product needs an image that people can relate to. The meaning of “relate to” is .

A. 理解
B. 联系
C. 讲述

events comfirmed our doubts.

A. remarkable
B. subsequent
C. civillian

The meaning of the verb “sheild” is .

A. protect
B. confine
C. reserve

The two subjects are quite from each other.

A. heightened
B. conflicted
C. distinct