地球上最初的生命诞生在( ) A.原始大气 B.现代大气 C.原始海洋 D.现代

题型:选择题

问题:

地球上最初的生命诞生在(  )

A.原始大气

B.现代大气

C.原始海洋

D.现代海洋

考点:生命的起源
题型:选择题

()应当为劳动者创造符合国家职业卫生标准和卫生要求的工作环境和条件,并采取措施保障劳动者获得职业卫生保护。

A、各级工会组织

B、用人单位

C、企业、科研单位、政府机关

题型:选择题

移动设备的橡套软电缆实际选用长度按照最远点的计算长度增加3—5米的机头部分活动长度。()

题型:选择题

An Australian man who has been donating his extremely rare kind of blood for 56 years has saved the lives of more than two million babies.

James Harrison has an antibody in his plasma(血浆)that stops babies dying from Rhesus disease, a form of severe anaemia. He has enabled countless mothers to give birth to healthy babies, including his own daughter, Tracey, who had a healthy son thanks to her father's blood.

Mr. Harrison has been giving blood every few weeks since he was 18 years old and has now racked up a total of 984 donations. When he started donating, his blood was deemed so special that his life was insured for one million Australian dollars.

He was also nicknamed the “man with the golden arm” or the “man in two million”. He said, “I've never thought about stopping. Never!” He made a pledge to be a donor aged 14 after undergoing major chest surgery in which he needed 13 liters of blood. “I was in hospital for three months,” he said. “The blood I received saved my life so I made a pledge to give blood when I was 18.”

Just after he started donating he was found to have the rare and life-saving antibody in his blood. At the time, thousands of babies in Australia were dying each year of Rhesus disease. Other newborns suffered permanent brain damage because of the condition. The disease creates an incompatibility between the mother's blood and her unborn baby's blood. It stems from one having Rh-positive blood and the other Rh-negative.

His blood has since led to the development of a vaccine called Anti-D. After his blood type was discovered, Mr. Harrison volunteered to undergo a series of tests to help develop the Anti-D vaccine. “They insured me for a million dollars so I knew my wife Barbara would be taken care of,” he said. “I wasn't scared. I was glad to help. I had to sign every form going and basically sign my life away.”

Mr. Harrison is Rh-negative and was given injections of Rh-positive blood. It was found his plasma could treat the condition and since then it has been given to hundreds of thousands of women. It has also been given to babies after they are born to stop them developing the disease.

It is estimated he has helped save 2.2 million babies so far. Mr. Harrison is still donating every few weeks now.

小题1:What does the underlined phrase “two million” refer to?

A.mothers

B.babies

C.dollars

D.blood小题2:Why did James decide to donate his blood? Because _____.

A.his daughter asked him to help her son

B.he has a golden arm worth a million dollars

C.a vaccine called Anti-D is to be developed

D.someone else’s blood saved his life小题3:The sentence “The disease creates an incompatibility between the mother's blood and her unborn baby's blood” (underlined in Paragraph 5) suggests that _____.

A.the mother and the baby have different types of blood

B.babies suffer permanent brain damage before born

C.Rhesus disease contributes to permanent brain damage

D.all the patients have a rare antibody in their blood小题4:What can we infer from the sixth paragraph?

A.His wife Barbara needed to be taken care of badly then.

B.Mr. Harrison was not glad to help develop a new vaccine.

C.Some of the tests to develop the vaccine are dangerous.

D.His blood type was accidentally discovered after tests

题型:选择题

治疗眩晕痰浊中阻证。应首选()

A.天麻钩藤饮 

B.半夏白术天麻汤 

C.镇肝息风汤 

D.补阳还五汤 

E.地黄饮子

题型:选择题

火力发电厂高压用电系统,关于短路电流非周期分量对断路器开断电流的影响,下述正确的是( )。

A.当主保护动作时间与断路器固有分闸时间之和大于0.15s时,应计及非周期分量影响;

B.当主保护动作时间与断路器固有分闸时间之和小于0.11s时,应计及非周期分量影响;

C.当主保护动作时间与断路器固有分闸时间之和为0.11~0.15s,且短路电流周期分量为断路器额定开断电流的90%以上,应计及非周期分量影响;

D.当主保护动作时间和断路器固有分闸之和大于0.15s时,可不计及非周期分量影响。

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