問題詳情

四、閱讀測驗（31~50 題，選出最適當的選項） Passage 1 （31~35 題） Infectious disease is all around us. Disease-causing agents, such as viruses, usually have specific targets. Some viruses onlyaffect humans. Other viruses live in or affect only animals. Problems start when animal viruses are able to infect people as well,a process known as zoonosis. When an animal virus passes to a human, the result can usually be deadly. In the last three decades, more than 30 zoonotic diseases have emerged around the globe. HIV is an example; it evolved froma virus originally carried by African monkeys, and later chimps. Today, conservative estimates suggest that HIV has infectedabout 40 million people. For instance, SARS, a type of flu which jumped from chickens to humans, is another type of zoonoticdisease. But how do these viruses pass from animals to humans? Contact is crucial.
31. What is this passage mainly about?
(A) The lethal diseases of humans and animals.
(B) The symptoms of zoonotic diseases.
(C) The medicine for curing zoonotic diseases.
(D) The rise in the spread of viruses from animals to humans.

參考答案

答案：D
難度：非常困難0
統計：A(2),B(0),C(0),D(13),E(0)

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