单项选择题

The word "extract" in paragraph 2, sentence 2 is closest in meaning to ______.

A．essence
B．addition
C．selection
D．supplement
<上一题 目录 下一题>
热门 试题

单项选择题
The most successful treatment described in the passage was a serum prepared from ______.
A．the blood of patients who have been stung
B．poison extracted from bees
C．crushed bodies of bees
D．a placebo and a crushed-body extract
单项选择题
According to the researchers, the traditional treatment for bee stings is ______.
A．widespread
B．extremely harmful
C．almost futile
D．sensitizing
相关试题