赞题库-背景图
单项选择题

According to the news, the American space shuttle Columbia failed______.

A．on Jan. 3rd
B．on Feb. 1st
C．on Mar. 4th
D．on Jan. 2nd
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热门试题

单项选择题What kind of people is more likely to develop, or suffer from Alzheimer's

A．People who are older than 65.
B．People who are physically weak.
C．People who consume saturated fat.
D．People who consume ordinary oil.

单项选择题How many old people have been examined for the research

A．815.
B．855.
C．831.
D．865.