问题 单项选择题 A1/A2型题

以下关于流行性腿腺炎病毒的叙述错误的是()。

A.属副黏病毒科

B.只有一个血清型

C.儿童患流行性腮腺炎后,病毒潜伏于体内,到青春期可引发男性睾丸炎、女性卵巢炎

D.CPE主要表现细胞聚集,有时可产生细胞融合并形成嗜酸性包涵体

E.不分节段的单负链RNA病毒

答案

参考答案:C

解析:人体感染流行性腮腺炎病毒后获持久免疫力。睾丸炎、卵巢炎等是流行性腮腺炎的并发症。

阅读理解

Canada is a very large country. It is the second largest country in the world .By contrast it has a very small population. There are only about 29 million people there. Most Canadians are of British or French origin(后裔), and French is an official language of Canada as well as English .About 45%of the people are of British origin, that is, they or their parents or grandparents, etc, come from British. Nearly 30% are of French origin. Most of the French–Canadians live in province of Quebec.

Over the years, people have come to live in Canada from many countries in the world .They are from many countries in the world .They are from most European countries and also from China, besides other Asian countries.

However, Canada was not an empty country when the Europeans began to arrive. Canadian Indians lived along the coast, by the rivers and lakes and in forests. Today, there are only about 350,000 Indians in the whole country, with their own languages. In the far north live the Inuit. There are only 27,000 Canadian-Inuit. Their life is hard in such a difficult climate.

小题1:The phrase “By contrast” in the passage means ____.

A.同时

B.相比之下

C.而且

D.实际上小题2:About ____ live in Quebec.

A.30% of the French –Canadians

B.45% of the Canadians

C.27,000 people

D.350,000 French – Canadians小题3:The official languages of Canada are ____.

A.English and Chinese

B.French and English

C.Indian and French

D.Chinese and Inuit小题4:About 23% of people in Canada came from _____.

A.China

B.England

C.France

D.some other countries except France and Britain

单项选择题