题目内容

Soon they could see the stream ______ from the wet clothes.

A. to rise
B. rising
C. risen
D. being rising

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I saw him ______ away on a stretcher.

A. carried
B. carrying
C. to be carried
D. being carried

She was not interested in the question ______.

A. discussing
B. be discussed
C. being discussed
D. to discussed

甲型流感病毒亚型划分的依据是:

A. 包膜上的HA和NA
B. 核酸
C. 核糖核蛋白
D. M蛋白
E. 核蛋白

造成流感世界性大流行的原因是:

A. 流感病毒抗原性不强,故免疫力不强
B. 流感病毒对理化因素的抵抗力强
C. 流感病毒型别多
D. 甲型流感病毒易变异成新的亚型
E. 乙型流感病毒易变异形成新亚型