问题 选择题

如图表示蚊子吸食了甲的血液后,又吸食乙血液的过程.甲的血液中含有流行性乙型脑炎病毒,乙被蚊子叮咬后也患上了该病.在此传染源和传播途径分别是(  )

A.甲和流行性乙型脑炎病毒

B.流行性乙型脑炎病毒和蚊子

C.甲和蚊子

D.蚊子和乙

答案

传染病流行的三个基本环节是:传染源、传播途径和易感人群.传染源:能够散播病原体的人或动物.传播途径:病原体离开传染源到达健康人所经过的途径叫传播途径,如空气传播、饮食传播、生物媒介传播等.易感人群:对某种传染病缺乏免疫力而容易感染该病的人群叫易感人群.图中甲为一患传染病的患者,能够散播病原体,所以属于传染源.蚊子是传播此传染病的生物媒介,所以属于传播途径.

故选:C

阅读理解

Most people agree that it’s important to have a sense of humour. Having the ability to laugh can help one overcome anxiety, and make better decisions in difficult situations. People with a well-developed sense of humour appear to be happier, and some are healthier as well. This suggests that having a sense of humour is good for you. Humourless people may find themselves being treated as a fool, and become anxious and upset.

A sense of humour also plays an important role in human relationships. However, not everyone has a sense of humour. People with developmental disabilities (发展性能力丧失) can sometimes have no sense of humour, or have a very strange one.

A number of factors affect a person’s sense of humour, with the age probably being the main one. Young children are often highly amused by simple jokes or shows, while teenagers prefer to enjoy the ironic (讽刺的) events. Educational level, culture, and religious faith also affect one’s sense of humour. While Christians, for example, may have a deep appreciation of jokes about the Bible, others may find them disrespectful.

Many people believe that a sense of humour is something that develops on its own, and that you cannot teach someone to understand why jokes, certain comments, situations or events are funny. However, things can be done to enhance one’s sense of humour. Children, for example, benefit from being told jokes and encouraged to laugh, although some children’s jokes might seem rather strange to adults. If you have children, try to encourage them to tell jokes and think about what makes things funny. And it will help them develop a sense of humour.

小题1:The purpose of the passage is to _______.

A.explain what influences a person’s sense of humour

B.tell readers the importance of being healthy

C.explain how to make better decisions

D.tell readers how to understand jokes小题2:What does the underlined word in Paragraph 4 "enhance" probably mean?

A.Enjoy.

B.Reduce.

C.Improve.

D.Prevent.小题3:According to the passage, which of the following doesn’t influence one’s sense of humour?

A.Culture.

B.Age.

C.Educational level.

D.Family backgrounds.

单项选择题