单项选择题

From the passage, we know that dieldrin is ______.

A．a kind of falcon
B．a kind of pesticides
C．a kind of catfish
D．not mentioned in the passage
<上一题 目录 下一题>
热门 试题

单项选择题
The main purpose of the first 3 paragraphs of the passage is to ______.
A．prove that contaminants are harmful to health
B．show that contaminants could affect the future generations
C．describe some experiments made by toxicologists
D．urge that pesticides should be abandoned
单项选择题
Which of the following statements is true
A．Without a prospect of a of at the end of investment, no one would ever lend money to anyone involved in bio-medical research.
B．Private fund is the most important financial source for scientific research.
C．It is commonly agreed that people can dispose their own body organs because of their ownership.
D．Commercial use of body organs is unconstitutional in the US.
相关试题