单项选择题

Recent research into aging suggests that the body's defense mechanisms may lose the ability to distinguish what is alien.

A．insane
B．infectious
C．foreign
D．poisonous
<上一题 目录 下一题>
热门 试题

单项选择题
In the play Who's Afraid of Virginia Woolf a woman and her husband spend most of their time quarreling.
A．arguing on small matters
B．fighting for who is right
C．gossiping on their neighbors
D．teasing on each other
单项选择题
As a famous leader of human rights movement, Martin Luther King detested injustice.
A．recognized
B．suffered
C．confronted
D．hated
相关试题