单项选择题

In the first sentence, the word "laymen", means ______.

A．people who stand aside
B．people who are not trained as biologists
C．people who are amateur biologists
D．people who love animals
<上一题 目录 下一题>
热门 试题

单项选择题
The meaning of the underlined words in the details of spontaneous family relationships can be expressed as ______.
A．natural family relationships
B．quickly occurring family relationships
C．animals acting like a natural family
D．animal family behavior that cannot be preplanned or controlled
单项选择题
According to the explanation of the scientific rule of experiment in the passage, hard-and-fast means experiment procedures ______.
A．are difficult and quick to follow
B．must be carried out in a strict and quick way
C．must be followed strictly to avoid false and loose results
D．hard and unreasonable for scientists to observe
相关试题