Your body uses food in space the same way it does on Earth.Your body must get rid of waste in space too.

　　During take off and landing，astronauts can't leave their seats to go to the bathroom.They wear diapers(尿布) under their spacesuits instead.

　　The Space Shuttle has a bathroom the size of a small closet.The toilet has bars that keep astronauts from floating away.

　　A strong flow of air is used instead of water to flush waste down the toilet.Back on Earth it's flushed away－or sometimes studied by scientists.

　　【语篇解读】 本文介绍宇航员在太空中的日常生活。

　　5．Why do astronauts use liquid forms of salt and pepper to prepare food?

　　A．Liquid doesn't spoil.

　　B．Liquid is convenient to use in space.

　　C．Liquid is lightweight.

　　D．Astronauts are in great need of water.

　　答案　B　[细节理解题。由第三段中的To prepare their food, astronauts use liquid forms of salt and pepper.The liquid sticks to the food better.Regular salt and pepper would float away, maybe up an astronaut’s nose.Achoo！可知，宇航员使用液体调料是因为液体不会像固体那样漂浮，使用起来更方便。]

　　6．What do astronauts think of space foods?

　　A．Most of them taste pleasant.

　　B．They are mostly fruits.

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