Ifpeopleareexposedtored,whichofthefollowingstatementsdoesnothappen?
A.Theybreathefaster.
B.Theirbloodpressurerises.
C.Theyfeelafraid.
D.Theirheartsbeatfaster.
正确答案:C[解析]见本文倒数第六行第二句话,人们面部显红色,这与他们呼吸加速、血压升高、心跳加速有关,而不是因为害怕。

Ifpeopleareexposedtored,whichofthefollowingstatementsdoesnothappen?
A.Theybreathefaster.
B.Theirbloodpressurerises.
C.Theyfeelafraid.
D.Theirheartsbeatfaster.
正确答案:C