单项选择题

It can be inferred from the passage that which of the following is needed to make the trumpet work

A．Air pressure.
B．Daily cleaning.
C．Keen eyesight.
D．Longer fingers.
<上一题 目录 下一题>
热门 试题

单项选择题
Why researchers put trees in extra carbon dioxide in the first study
A．To learn whether trees can still absorb carbon dioxide under extreme conditions.
B．To get more oxygen from these trees.
C．To evaluate the maximum carbon dioxide that trees can absorb.
D．To see the growth rate of these trees.
单项选择题
The author believes that the trumpet is particularly important because it ________.
A．can be used in rock bands
B．has historical significance
C．is a religious instrument
D．has a narrow range
相关试题