最大鸡肉出口国出现野鸟禽流感

In Brazil, several cases of avian flu (禽流感) were found in wild birds. Seven cases were reported in Espirito Santo state. Another was discovered in Rio de Janeiro state. Brazil has announced a six-month animal health emergency. That makes it easier for the government to now take action to stop the dangerous H5N1 virus from spreading.

Brazil is the world’s largest country that sells chicken meat to other countries. It sells nearly $10bn of chicken meat a year. The government says the cases were found far away from Brazil’s main areas of production. However, the discovery of avian flu cases in wild birds may lead to spread in chickens and other animals. The finding of a case on a farm often causes the kill of a large number of birds. It can sometimes result in trade restrictions (限制) from other countries. The health emergency has been announced across the whole country for the next 180 days as a precaution.

The world has been going through its worst bird flu ever since October 2021, causing the deaths of more wild birds than ever before. But scientists remain unsure why this bird flu is proving so much worse than others. The World Health Organization (WHO) says the further spread of the H5N1 virus will have to be monitored (监测) closely to see whether it is changing into a form which can spread among humans.

1.What does the underlined word “That” refer to?

A The finding of bird flu.

B The emergency.

C The announcement.

D The spread of the virus.

解析：选C。C词意指代题。根据第一段划线单词前一句“Brazil has announced a six-month animal health emergency.”可知that指的是巴西宣布进入为期6个月的动物卫生紧急状态，即指的是此项宣布。故选C。

2.What may bird flu cause?

A People’s scare.

B The increase of birds.

C Unhealthy chickens.

D Relaxing trade policy.

解析：选C。C细节理解题。根据第二段第四句“However, the discovery of avian flu cases in wild birds may lead to spread in chickens and other animals.”可知鸟类的禽流感可能传播致鸡类和其他动物。即鸡可能会变得不健康。故选C。

3.Why is the bird flu so bad now?

A Because the virus is developing.

B Because there are more birds.

C Because it can make chickens weak.

D It’s not mentioned.

解析：选D。D细节理解题。根据第三段第二句“But scientists remain unsure why this bird flu is proving so much worse than others.”可知，为何此次禽流感感染情况如此严重还未知。故选D。

4.What’s required according to WHO?

A Changing the virus into another form.

B Reducing the death of wild animals.

C Avoiding the spread of the virus.

D Testing the virus regularly.

解析：选D。D细节理解题。根据最后一段最后一句“The World Health Organization (WHO) says the further spread of the H5N1 virus will have to be monitored (监测) closely to see whether it is changing into a form which can spread among humans.”可知，世界卫生组织要求，必须密切监测H5N1的进一步传播。故选D。

5.What’s the passage mainly about?

A Health In Brazil.

B Health: Chicken And Birds.

C Bird Flu In Brazil.

D World Cases Of Bird Flu.

解析：选C。C主旨大意题。根据文章主旨段第一段可知，本文主要讲述了巴西在野鸟中发现了多例禽流感病例，宣布全国进入为期6个月的动物卫生紧急状态。故选C。