问题
单项选择题
经过积极的防治,疟疾仍然是重大的世界卫生问题,难以根除,原因除外:()
A.在繁殖周期中产生大量的子代
B.不同阶段疟原虫抗原的多样性
C.通过多种途径传播
D.耐氯喹疟疾增多
E.疟原虫抵抗力强
答案
参考答案:E
经过积极的防治,疟疾仍然是重大的世界卫生问题,难以根除,原因除外:()
A.在繁殖周期中产生大量的子代
B.不同阶段疟原虫抗原的多样性
C.通过多种途径传播
D.耐氯喹疟疾增多
E.疟原虫抵抗力强
参考答案:E
完形填空:阅读短文,并从四个选项中,选择正确的答案。 | |||
My father 1 a good friend in the factory (工厂). He is sixty. He is an old man. All of the children like him. We call 2 Uncle Sam. He 3 from England. He 4 in Sichuan. He can't 5 Chinese. We teach (教) him Chinese. He 6 us English. He 7 work on Sundays. He 8 making things. And he likes watching TV with his children at night. | |||
( )1. A. have ( )2. A. he ( )3. A. come ( )4. A. live ( )5. A. speak ( )6. A. teach ( )7. A. do ( )8. A. likes | B. haves B. they B. comes B. living B. tell B. teachs B. don't B. like | C. has C. him C. goes C. lives C. say C. teaches C. does C. to like | D. is D. his D. to come D. to live D. talk D. teaching D. doesn't D. liking |