问题 单项选择题

传统理论认为,人类祖先由于气候变化、树木减少,被迫离开树栖环境,选择在地面上直立行走。一项最新研究则认为,早期人类直立行走源自现今非洲东部和南部崎岖山脉地区,该地形是上新世时期火山喷发和构造板块移动形成的。人类的祖先被岩石地形和峡谷所吸引,这里可提供很好的庇护栖息地。同时有机会诱捕猎物;这种环境要求早期人类具备直立行走和攀登的能力,因此人类祖先最终逐渐进化为两足直立行走。 下列哪项与最新研究的结论相符?

A.气候变化致使早期人类选择直立行走 

B.人类祖先选择直立行走是为了更好适应地形环境 

C.地质条件的变化改变了人类早期祖先的行走方式 

D.人类祖先由于食物匮乏被迫离开最初的生活环境

答案

参考答案:B

解析:解析 A项通过“人类祖先由于气候变化、树木减少,被迫离开树栖环境,选择在地面直立行走”可以看出,A项表述不全面。C、D项文段中未提及到,属于无中生有项。排除C、D项。根据文段的最后一句,“这种环境要求早期人类具备直立行走和攀登的能力,因此人类祖先最终逐渐进化为两足直立行走。”说明人类祖先选择直立行走是为了更好适应地形环境。因此,本题答案为B选项。 考点:细节判断题

单项选择题 A1型题
阅读理解

B

Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu — but which one? Although both colds and flu are caused by viruses, they are very different illnesses.

Colds, which usually last about a week, affect the nose most. They commonly cause a running nose and sneezing. Sometimes, they cause a headache, a cough and slightly aching muscles.

Flu is a much more serious illness and is caused by different group of viruses. People with flu usually get all the symptoms described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the characteristic symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don’t disappear for at least two weeks.

Flu can be a deadly disease. The elderly, who are weaker and less healthy than most younger people, can die from flu. This is one reason why old people are advised to have a flu injection (预防针) before the start of winter when flu is most common. This injection is inexpensive and definitely worth it.

If you have a cold or flu, you must always deal with used tissues (纸巾)carefully. Don’t leave dirty tissues on your desk or on the floor. Someone else has to pick these up and viruses could be passed on. And finally, remember to cover your nose and mouth when you sneeze! You don’t want to see the small drop of liquids blown out of your nose and mouth when you sneeze, do you? Disgusting, eh? Now you can understand why it’s a good idea to cover your nose and mouth when you sneeze!

60. According to the passage, people with colds hardly get _______.

A. a headache               B. a high fever                     C. a running nose          D. aching muscles

61. In paragraph 4, we learn that _______.

A. flu injection can cause death                                 B. most old people die from flu

C. flu is most common in summer                             D. flu can kill old people easily

62. Dealing with used tissues properly is important because _______.

A. it helps keep your classroom tidy                          B. people hate picking up dirty tissues

C. it prevents the spread of colds and flu                       D. picking up lots of tissues is hard work

63. Which of the following statements is true according to the passage?

A. Both colds and flu last the same time.                  

B. Both colds and flu can be prevented by injection.

C. Both colds and flu are caused by the same viruses. 

D. Both colds and flu have an aching symptom.