题目内容:
Questionsarebasedonthepassageyouhavejustheard.
根据录音,选择合适的答案() A.Becausethetemperatureonthegroundislower.
B.Becausepeoplecanseemoreclearlyinthelowarea.
C.Becausethereislesssmokeinthelowarea.
D.Becausetheexitsignsareinthelowarea.
参考答案:
答案解析: