单项选择题

The Smithsonian houses a miscellaneous collection of aircraft, artifacts, butterflies, stones [both precious and common], and so on.

A．a heterogenous
B．an overwhelming
C．a unified
D．a vast
<上一题 目录 下一题>
热门 试题

单项选择题
Chaos theory stresses the magnitude of the results produced by so small an event as the fluttering of a butterfly's wings.
A．size
B．volume
C．result
D．fame
单项选择题
The Salk polio vaccine provides immunity from that disease.
A．security
B．publicity
C．liability
D．help
相关试题