人患囊尾蚴病是因误食（）
A.猪带绦虫囊尾蚴
B.牛带绦虫囊尾蚴
C.猪带绦虫卵
D.牛带绦虫卵
E.痘猪肉
参考答案：C
If the sun’s rays were entirely _______, there would be dramatic changes in the climate on the earth, and the result could be disastrous to the human race. [ ]
A. covered out
B. broken out
C. blocked out
D. left out
少数急性有机磷中毒患者发生中间综合征，其出现时间为
A．2～6h
B．8～12h
C．1～4d
D．2～3周
E．数日至1周后
