logo - 刷刷题
下载APP
【判断题】

一类物种的灭绝预示着有很多物种也可能面临灭绝。这种说法对吗?

A.
正确
B.
错误
题目标签:灭绝能面预示着
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】何为等能面?

A.
K 空间中能量相同各点构成的曲面
B.
K 空间中一定 K 值处的能量面
C.
K 空间极值点附近 K 值一定的能量面

【单选题】Many people feel that human beings are responsible for the disappearance of some other animal species. While we may have hastened the disappearance of some, abundant evidence suggests mankind has had ...

A.
Human beings have hastened the disappearance of some.
B.
There was mass extinction long before humanity's time on Earth.
C.
Human beings'activities have had great impact on the earth.
D.
Many species have extinct since the human race came into being.