Whatshouldadriverdowhenascending?
A)Riseslowly.
B)Breathefaster.
C)Relaxcompletely.
D)Breathehelium.
正确答案:A答案:A
[试题分析]事实了解题。
[详细解答]根据文章的最后一段的最后一句中的“adivermustascendslowly"可知答案为A。

Whatshouldadriverdowhenascending?
A)Riseslowly.
B)Breathefaster.
C)Relaxcompletely.
D)Breathehelium.
正确答案:A上一篇 According to the passage, one important change in United States education by the 1920'
下一篇 A) better than B) other than C) rather than D) sooner than