Question

London—coffee protects mice from radiation and could get the same way in humans, according to Indian scientists.

Scientist at India’s Bhabha Atomic Research Center discovered that mice injected with caffeine (咖啡因)remained alive after high doses(剂量)of normally lethal radiation.

Although the study was limited to animals, Kachadillilli George, head of the research team, believes the findings could have implications (something suggested )  for humans .

“It does suggest that coffee might have some beneficial effects in protecting against radiation,” he told New Scientist magazine late last month.

George and his team injected 471 mice with caffeine and left them uncovered to 7.5 grays of gamma radiation(伽玛射线),enough to kill most mice. But 25 days later 70 percent of the mice that had received 80 milligrams(毫克)of caffeine per kilogram of body weight were still alive.

On the contrary all 196 mice that had been left uncovered to the same radiation but had not been given any caffeine died.

1.George and his team drew the conclusion from    .

A．the magazine       B．their invention      C．the experiment     D．their experience

2.From the news, we know     can be protected from radiation.

A．both mice and humans                   B．only mice

C．only humans                           D．neither humans nor mice

3.From paragraph 5, we know 30 percent of the mice died 25 days later. The reason was probably that     .

A．these mice had been given only 80 milligrams of caffeine

B．these mice hadn’t been injected with caffeine

C．these mice were very big and strong

D．these mice hadn’t been given enough caffeine

4.Which is the best title of the article?

A．Human and Mice                        B．New Radiation Defense—Coffee

C．Deadly Radiation—Gamma Radiation         D．Mice Died of Caffeine

5.In paragraph 2,the underlined word “ lethal ”means   .

A．causing death      B．lively             C．exciting           D．rich

Answer

1.C

2.A

3.D

4.B

5.C

【解析】

试题分析：本文介绍了一项新的研究发现，科学家对老鼠做的实验，得出结论咖啡因可以使老鼠和人类防御辐射。

1.推理题：从第五段的内容，可知科学家对老鼠做的实验，然后得出结论的。选C

2.细节题：从第一段的内容：London—coffee protects mice from radiation and could get the same way in humans,可知老鼠和人类都可以免受辐射的影响。选A

3.细节题：从文章的最后一段：On the contrary all 196 mice that had been left uncovered to the same radiation but had not been given any caffeine died.可知这些老鼠没有被注射过咖啡因。选D

4.主旨题：从第一段和第二段的内容，可知讲的是咖啡因可以防御辐射。选B

5.猜词题：从所在的句子的remained alive可知这些剂量本来是可以导致死亡的。选A

考点：考查新闻报道类短文