【多选题】【消耗次数：1】
国家动物疫病强制免疫目标要求：强制免疫动物疫病的群体免疫密度应常年保持在90%以上，应免畜禽免疫密度应达到100%，（）免疫抗体合格率常年保持在70%以上。
①
新城疫
②
口蹄疫
③
小反刍兽疫
④
高致病性禽流感
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相关题目
【单选题】
布病强制免疫工作有效开展，免疫地区免疫密度常年保持在90%以上，免疫建档率100%，免疫奶牛场备案率100%，免疫评价工作开展率()%。
①
70
②
80
③
90
④
100
随机题目
【单选题】
The car ran over the child, but by a _____ he was unhurt.
①
wonder
②
marvel
③
miracle
④
surprise
【单选题】
You will probably _____ your team’s chance to win because you seem to have such a great ______them.
①
affect; influence
②
effect; influence
③
affect; effect on
④
effect; affect on
【单选题】
Can you go to the concert with us this evening?____________
①
No, I already have plans.
②
I’d love to, but I’m busy tonight.
③
No, I really don’t like being with you.
④
I’m ill, so I shouldn’t go out.
【单选题】
Havent seen you for ages. Lets have a dinner together this weekend.____________
①
Yes, of course.
②
Welcome!
③
No, thanks.
④
Great idea!
【单选题】
I was satisfied with her explanation, ______.
①
so my classmates were
②
so were my classmates
③
so my classmates did
④
so did my classmates
【单选题】
A kind teacher always takes a very _______ attitude when correcting students’ mistakes.
①
negative
②
partial
③
potential
④
positive