问题 选择题

读“流星雨景观示意图”,回答问题。

小题1:地球上的流星绝大部分都在大气中燃烧掉了,其产生的地理意义是

A.使地球表面的温度升高

B.避免了地球上的生物遭受过多紫外线的伤害

C.减少了小天体对地球表面的撞击

D.使地球表面昼夜温差不至于过大小题2:图示流星体属于

A.绕地球公转的天体

B.绕太阳公转的天体

C.绕行星公转的天体

D.绕恒星公转的天体

答案

小题1:C

小题1:B

本题考查天体。

小题1:月球上,由于没有大气,故因流星体撞击月球表面产生众多的陨石坑,故地球上的流星绝大部分都在大气中燃烧掉了,减少了小天体对地球表面的撞击。

小题1:流星体是存在于太阳系中的微小颗粒,环绕太阳运动。流星群是许许多多沿着相同 的轨道绕转太阳的流星体,它们的共同轨道在一定的宇宙空间同地球轨道相交。地球一年一度经过这一空间,并在同一天空区域形成流星雨。

单项选择题
阅读理解

Two more cases of H7N9 bird flu virus have been detected in Zhejiang province, including a man who died last week, authorities said on Wednesday.

The Chinese Center for Disease Control and Prevention confirmed that a 38-year-old patient surnamed Hong from Hangzhou, the provincial capital, who died in hospital on March 27, had the virus.

Hong was infected on March 7 while working in neighboring Jiangsu province. He returned home on March 18, according to the Zhejiang health department.

The other patient, surnamed Yang, is a 67-year-old man. He developed a cough and fever on March 25 and was admitted to hospital on Tuesday.

None of the people who came into close contact with the patients have developed symptoms of the flu, the health department said.

On Sunday, two men in Shanghai died from H7N9. A woman in Anhui province and four men in Jiangsu province remain in criticalcondition, which makes a large number of people scared to death.

All patients had fevers and coughs in the early stages before developing pneumonia(肺炎) and breathing difficulties, China's health authorities said.

Experts say genetic analysis shows that the H7N9 virus can be treated with Tamiflu, an antiviral drug that may slow the spread of influenza(流感,家畜流行性感冒) in the body.

Wang Xianjun, head of the Shandong provincial center of disease control, said H7N9 is sensitive to neuraminidase-inhibiting medicine such as Tamiflu, Qilu Evening News reported on Wednesday.

There are no effective vaccines(疫苗) for H7N9 as yet, Wang said, but using Tamiflu may be effective in the early stages.

小题1:According to this passage, the most cases of H7N9 bird flu virus have been detected in ______.

A.Zhejiang province

B.Anhui province

C.Shanghai

D.Jiangsu province小题2:From the whole passage we can learn that_______.

A.two men in Shanghai and a woman in Zhejiang province died from H7N9.

B.the H7N9 virus can be cured with an antiviral drug called Tamiflu.

C.all the patients infected with H7N9 had fevers and coughs in the early stages.

D.only one patient has died from H7N9 in Anhui.小题3:The underlined word in the sentence “…four men in Jiangsu province remain in critical condition” may be close to ______ in meaning.

A.very serious and dangerous

B.extremely important

C.quite healthy

D.not serious or dangerous小题4:The passage is mainly about _____.

A.the medicine for H7N9

B.the spread of H7N9 and an antiviral drug

C.the number of patients who died from H7N9

D.people who came into close contact with the patients of H7N9