单项选择题

What is the tone of the author

A．Negative.
B．Critical.
C．Objective.
D．Positive.
<上一题 目录 下一题>
热门 试题

单项选择题
According to the author, the first computing machine was in use ______ years ago.
A．500
B．1,000
C．5,000
D．10,000
单项选择题
The last important idea mentioned in the passage is ______.
A．the invention of the abacus
B．the birth of a good computing machine
C．the idea of Zero
D．the idea of tens or hundreds
相关试题