单项选择题

The Salk polio vaccine provides immunity from that disease.

A．security
B．publicity
C．liability
D．help
<上一题 目录 下一题>
热门 试题

单项选择题
The jungles of the sub-Sahara, afflicted with tse-tse and mosquitos, is an unhealthy area.
A．requiring inoculation against
B．heated by
C．flooded by
D．plagued by
单项选择题
An intelligent TV viewer may occasionally become enraged by the ______ argumentation in commercials.
A．imperative
B．fallacious
C．persuasive
D．fabulous
相关试题