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符合高致病性猪蓝耳病的选项是（ ）。
A.
是由猪繁殖与呼吸综合征病毒变异株引起的
B.
是一种急性高致死性疫病
C.
仔猪的发病率可达100%、死亡率可达50%以上
D.
发病猪脾脏边缘或表面出现梗死灶，显微镜下见出血性梗死
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参考答案：
A
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举一反三
According to the passage, which of the flowing is NOT true?
A.
Newton worked out the orbit of the comet.
B.
Halley worked out the orbit of the comet first.
C.
Newton gave Halley some help.
D.
Halley died before 1758.
This passage in general is about ____________.
A.
Halley and other scientists
B.
the orbit of a comet
C.
Newton and Halley
D.
Halley and his discovery
Halley made a surprising, but correct prediction（预言）in the year ____________.
A.
1704
B.
1705
C.
1706
D.
1707
The main purpose of the laptop program is to give each student a laptop to ____________.
A.
use for their schoolwork
B.
access the Internet
C.
work at home
D.
connect them to libraries
Why is the word “speak” in the second paragraph in quotation marks（引号）?
A.
They don’t really talk.
B.
They use the computer language.
C.
Laptops have speakers.
D.
None of the above reasons is correct.
相关题目：
According to the passage, which of the flowing is NOT true?
A.
Newton worked out the orbit of the comet.
B.
Halley worked out the orbit of the comet first.
C.
Newton gave Halley some help.
D.
Halley died before 1758.
This passage in general is about ____________.
A.
Halley and other scientists
B.
the orbit of a comet
C.
Newton and Halley
D.
Halley and his discovery
Halley made a surprising, but correct prediction（预言）in the year ____________.
A.
1704
B.
1705
C.
1706
D.
1707
The main purpose of the laptop program is to give each student a laptop to ____________.
A.
use for their schoolwork
B.
access the Internet
C.
work at home
D.
connect them to libraries
Why is the word “speak” in the second paragraph in quotation marks（引号）?
A.
They don’t really talk.
B.
They use the computer language.
C.
Laptops have speakers.
D.
None of the above reasons is correct.
参考解析：
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