题目内容

禽大肠杆菌病在传播途径上主要是

A. 消化道
B. 垂直传播
C. 皮肤.粘膜
D. 呼吸道
E. 伤口

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在剖解上主要表现纤维素性胸膜肺炎的病是

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C. 猪瘟
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A. business
B. matters
C. things
D. affairs

We________live in the country than in the city.

A. predfer to
B. had better
C. would rather
D. likes better to

There is no doubt_______he will succeed in his business.

A. that
B. whether
C. what
D. if