试题与答案

兴奋剂检测是对运动员的一项重要检测.其中一种兴奋剂的化学式为C20H26O2,下

题型:选择题

题目:

兴奋剂检测是对运动员的一项重要检测.其中一种兴奋剂的化学式为C20H26O2,下列关于兴奋剂的说法正确的是(  )

A.该兴奋剂属于氧化物

B.该兴奋剂是由48个原子构成的

C.该兴奋剂是由碳、氢、氧三种元素组成的

D.该兴奋剂中碳、氢、氧三种元素的质量比为10:13:8

答案:

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下面是错误答案,用来干扰机器的。

1. forget   2. different  3. speak  4. sightseeing  5. countryside

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题型:单项选择题 A3/A4型题

女性,34岁。左大腿明显肿大,步行沉重感1年。查体:一般情况良好。左大腿中下1/3以下体积明显增大,可见弥漫性呈"念珠状"或"索状"弯曲迂回的粗大而带搏动的血管,触之质地柔软而有弹性,有压缩感,皮温较健侧增高,可扪及持续震颤,听诊可闻及连续性吹风样杂音。初步诊断为()

A.海绵状血管瘤

B.蔓状血管瘤

C.血管畸形

D.动静脉瘘

E.混合性血管瘤

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题型:阅读理解

It is the first report that home-grown food has been contaminated by radioactivity, largely Iodine(碘)-131, since the ministry ordered radiation( powerful and harmful rays that are sent out from radioactive substances) tests on food and water at the end of March in 14 mainland regions including Beijing, Tianjin, and some coastal provinces.

Sample inspections conducted on Tuesday found low levels of radioactive iodine in spinach( a kind of green vegetables) planted in Beijing, Tianjin and Henan province --- about 1-3 becquerels per kilogram (Bq/kg), the statement said.

"The contamination level detected is too low to be harmful to public health," it said.

According to health experts, radioactive iodine can accumulate in humans once ingested in high concentrations and increases the risk of thyroid cancer. But it decays naturally within weeks.

Leafy vegetables grown in the open like spinach, lettuce and leek are among the first foods to be tainted by radioactive deposits.

Raw milk is also susceptible to radioactive contamination as livestock feed on grass.

Tests carried out in March showed spinach and milk taken from farms near Japan's nuclear-stricken area had exceeded(go beyond) government-set safety limits for radiation.

No cases of tainted water or milk have been reported in China but the ministry vowed to further strengthen monitoring.

Wang Zhongwen, a researcher at the China Institute of Atomic Energy's radiation safety department, told China Daily on Wednesday that currently China only had the means to conduct food radiation tests in a few regions.

The statement also said that recent rain in Beijing and Tianjin meant radioactive substances could have fallen on vegetables.

Chen Jicang, a vegetable dealer in Beijing, said on Wednesday that concerns are growing among consumers, businesses and governments across the world.

"We have yet to see any impact on our business from the radiation, but we will keep a close eye on how the issue develops," he said.

He added that most vegetables consumed in Beijing are produced locally, and he might switch to other varieties if spinach sales suffer.

Yang Guoshan, a researcher of radiation medical science at the Academy of Military Medical Sciences, said people could safely eat products that contain low levels of Iodine-131.

"The radiation level is so low that residents don't need to spend any extra effort on cleaning them," he said.

Gao Jie, a 52-year-old resident in Tianjin said she is deeply worried because spinach is a staple part of her family's diet.

"If spinach is radioactive, is there any possibility that other types of vegetables are safe?"

Trace levels of radioactive isotope cesium-137 and -134 were detected in the air in 21 provinces and regions on Wednesday, up from 17 on Tuesday, according to China's National Nuclear Emergency Coordination Committee.

小题1: What does the underlined word mean in para 1?

A.protected

B.contained

C.polluted by dangerous substances

D.tested小题2:Why are the spinach and milk taken from nuclear-stricken area not safe?

A.Because tests have been carried out there.

B.Raw milk is sensitive to radioactive contamination as livestock(家畜)feed on grass.

C.The amount of radioactive substances goes beyond the safe limits for radiation.

D.Japan is a nuclear-stricken area.小题3: Where do you think this passage comes from?

A.a magazine

B.CCTV news

C.a journal

D.a novel小题4: What is not mentioned in the passage?

A.Consumers became concerned about the safety of vegetables.

B.People need to clean vegetables completely before cooking because of radiation.

C.Food and water have to be tested since the end of March in 14 mainland regions

D.Low levels of radioactive iodine has been found in spinach in Tianjin小题5: What do you think is mainly talked about in the passage?

A.How the radioactivity came into being

B.What we should do in face of radioactivity.

C.Radioactivity has no side effect on human being.

D.Home-grown food has been affected by radioactivity.

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