更多"The population explosion is caused "的相关试题:
[单项选择]The population explosion is caused chiefly by ______
A. a fall in death rates
B. a rise in birth rates
C. competition between rich and poor countries
D. an increase in the amount of food per person
[单项选择]The Canadian population is chiefly characterized by ______.
A. its size
B. its growth
C. its linguistic duality
D. its French origins
[单项选择]With the population explosion, scientists will have to （ ） new methods of increasing the world's food supply.
A. come up with
B. carry out
C. lead to
D. stick to
[单项选择]According to the article, a population explosion of elk and deer was caused also by ______.
A. the adoption of a policy of aggressive predator elimination
B. the increased number of Nation Parks
C. the decreasing number of visitors to National Parks
D. the heavy exploitation of endangered animals in the 20 century
[单项选择]The possibility that the explosion was caused by sabotage cannot be ______.
A. broken out
B. cancelled out
C. ruled out
D. wiped out
[单项选择]A population explosion will lead to ______.
A. a lot of social problems
B. medical advances
C. a decrease in food production
D. a worse life in every nation with 3 billion
[单项选择]Scientists had thought the "explosion" was caused by ______.
A. a meteor
B. a small comet
C. an spaceship from another planet
D. some big fire
