单项选择题

The stone chip is thought to be the most important tool because it______.

A．was one of the first tools.
B．developed human capabilities.
C．led to the invention of machines.
D．was crucial to the development of mankin
<上一题 目录 下一题>
热门 试题

单项选择题
In the ancient days, human beings needed to use tools because______.
A．Human beings didn't have sharp teeth like other meat-eating animals and tools helped them to get food more easily.
B．Tools helped to develop human intelligence.
C．Tools helped the human beings to cut meat and skin from dead animals.
D．It was easy to make stone tools.
单项选择题
The author's chief purpose is______.
A．to inform us that people are dissatisfied with their wages and hours.
B．to explain that "job enrichment" creates job.
C．to suggest that bosses hinder production more than they help it.
D．to persuade us to carry out our greater" job simplification".
相关试题