单项选择题

A．Pollution of the environment.
B．A new generation of pest killers.
C．Over-killing by hunters.
D．Destruction of their natural homes.
<上一题 目录 下一题>
热门 试题

单项选择题
A．Many species have moved further north.B．Many new species have come into existence.C．Many species have developed a habit of migration.D．Many species have become less sensitive to climate.
A．Many species have moved further north.
B．Many new species have come into existence.
C．Many species have developed a habit of migration.
D．Many species have become less sensitive to climate.
单项选择题
A．Whether it can be detected and checked.B．Whether it will lead to widespread food shortage.C．Whether global warming will speed up in the future.D．Whether it will affect their own lives.
A．Whether it can be detected and checked.
B．Whether it will lead to widespread food shortage.
C．Whether global warming will speed up in the future.
D．Whether it will affect their own lives.
相关试题