正常成年人安静时的肺通气/血流比值为A.0.48B.0.84C.84D.48

题型:单项选择题

问题:

正常成年人安静时的肺通气/血流比值为

A.0.48
B.0.84
C.84
D.48

考点:普通考研西医综合西医综合
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塑料的发明堪称为20世纪人类的一大杰作,成为现代文明社会不可或缺的重要原料。科学家指出,在2l世纪,随着纳米塑料、光纤、能导电的塑料、有磁性的塑料、会记忆的塑料等各种更新颖的塑料的出现.人类的生活将更加丰富多彩。这表明(    )

A.生产决定消费的质量和水平  B生产和消费相互决定

C消费决定生产的规模和效益     D消费推动人类历史的进步

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Christopher Reeve was born in September, 1952. He was in his first school play when he was eight and he started   小题1:(act) in TV shows and films while he was still in college. He made many successful films and TV shows but he is   小题2:  (famous) for his Superman films.

Unfortunately, disaster came in 1995   小题3:  he fell from his horse and broke his back. The doctors did not expect him to live.   小题4: , he made   小题5: (amaze) progress. At first, he couldn’t breathe  小题6: a machine, but he learnt to breathe on his own. He would never walk again  小题7:  he started a new life with great courage.

The second year after his accident, Christopher returned to film making. He also raised a lot of money to promote medical research into back   小题8:  (injure). He made speeches all over the USA about   小题9:  experiences. This not only drew public attention   小题10:  research into back injuries but also encouraged a lot of people living with all kinds of problems.

题型:单项选择题

甲、乙两地的气候类型分别是(  )

A.温带大陆性气候、热带沙漠气候

B.温带季风气候、热带季风气候

C.温带大陆性气候、亚热带季风气候

D.温带季风气候、热带沙漠气候

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古猿经过长期的进化和劳动,学会了制造工具进化成为人类,最早的时间和地点分别是[ ]

A.距今一二百万年前、中国云南

B.距今约三百多万年、非洲埃塞俄比亚

C.距今约70~20万年、中国北京

D.距今约二三百万年、非洲撒哈拉沙漠

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简述福建土楼的独特魅力。

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