Manypeopledreamoftravelingintoouterspace．However，spend...

問題詳情：

 Many people dream of traveling into outer space．However，spending too much time in space may cause health problems， according to NASA．That's why astronauts shouldn't spend more than six months on the International Space Station （ISS） at a time．

    Muscle （肌肉） and bone loss

    In a weightless environment， astronauts don't need to use their muscles to support themselves，so their muscles start shrinking． To keep their muscles strong， astronauts need to exercise about 2 hours each day on the ISS．

    Sleep disorder （混亂）

    In space， the sun rises every 90 minutes．It is hard for astronauts to get used to this light- dark cycle when they sleep．Also，they need to sleep in a sleeping bag that is fixed to a wall， and it is uncomfortable．

    Astronauts now have individual sleeping pods （分離倉） that help shut out some of the light． Still，studies have found that most astronauts only sleep about six hours each night， even though they should have eight and a half hours．

    Brain change

    Scientists have found that the position of the brain changes during spaceflight． It can affect how the brain deal with how we see， stay balanced and move around． That's why some astronauts can't control their movement and balance after running to the Earth． Scientists have also found that astronauts may get used to this change after going on more spaceflights． But they still need to do more research．

（26）According to the passage， astronauts may have the flowing health problems EXCEPT______．

A． bone loss B． brain changes C． sleep disorder D． headache

（27）Astronauts may have muscle problems after returning to the Earth because______．

A． they seldom walk while in space

B． they are too busy to exercise in space

C． they don't have enough room to exercise in space

D． they don't need to use their muscles to support themselves in space

（28）Astronauts sleep in individual seeing pods to______．

A． stay warm at night

B． shut out light

C．enjoy a quiet place

D． avoid moving around

（29）The underlined word "shrinking"  in the second paragraph means______．

A．萎縮 B．改變 C．消失 D．膨脹

（30）The best title of this passage is______．

A． Sleep Disorder in Space

B． Brain Changes in Space

C． Muscle and Bone Loss in Space

D． Health Problems in Space

【回答】

26.D   27.D   28.B   29.A   30.D

【分析】本文主要介紹了根據美國宇航局的説法，在太空中花費太多的時間可能會導致健康問題．

【解答】（26）D．細節理解題．根據文中Muscle （肌肉） and bone loss肌肉和骨丟失；Sleep disorder （混亂）睡眠障礙；Brain change腦改變．可知頭痛不屬於宇航員的健康問題．故選D． 27.D．細節理解題．根據文中In a weightless environment， astronauts don't need to use their muscles to support themselves，可知在失重環境下，宇航員不需要用肌肉來支撐自己．因此宇航員返回地球后可能會有肌肉問題，因為他們不需要用肌肉在太空中支撐自己．故選D． 28.B．細節理解題．根據文中Astronauts now have individual sleeping pods （分離倉） that help shut out some of the light． 可知宇航員現在有單獨的睡眠艙，可以幫助遮擋一些光線．故選B． 29.A．詞義猜測題．根據文中In a weightless environment， astronauts don't need to use their muscles to support themselves，so their muscles start shrinking． To keep their muscles strong， astronauts need to exercise about 2 hours each day on the ISS．可知在失重環境下，宇航員不需要用肌肉來支撐自己，因此肌肉開始_____，為了保持肌肉的強壯，宇航員每天需要在*空間站上鍛鍊2小時左右．根據前後文含義以及結合選項可知，shrinking此處意為"萎縮"．故選A． 30.D．主旨大意題．通讀全文，尤其是根據第一段中However， spending too much time in space may cause health problems， according to NASA． 可知然而，根據美國宇航局的説法，在太空中花費太多的時間可能會導致健康問題．因此可知本文主要介紹了空間健康問題的相關情況．故選D．

知識點：健康保健類

題型：閲讀理解