单项选择题

The author hopes that studies on the influence of geographical environment will enable us to______.

A．generalize better about types of people
B．find better water supplies
C．gain an insight into its influence on mankind
D．live to a ripe old age
<上一题 目录 下一题>
热门 试题

单项选择题
The author's conclusion about the subject is that______.
A．human race is likely to be taken over and crushed by a race of robots
B．computers are not yet likely to be made to reproduce similar or more advanced ones
C．the world is faced with the threat coming from monster machines
D．giant computers more intelligent than human brains will .soon be produced
单项选择题
We may infer that iodine, fluoride and calcium are______.
A．substances which act positively or negatively on man's health
B．harmful substances in the water supply
C．substances which help provide breeding places for pests
D．substances contributory to good health
相关试题