would float away maybe up an astronaut's nose.

　　 Liquids float right out of cups and glasses though. So astronauts drink everything from a small bag with a straw(吸管) that can be closed. Astronauts say that most space foods taste pretty good. Some such as apples and pudding are the same as the foods you eat on Earth.

　　 Astronauts eat tortillas(玉米粉圆饼) instead of bread because they make fewer crumbs(碎屑). Floating crumbs could get stuck in equipment or an astronaut's eyes.

　　 Your body uses food in space the same way it does on Earth. Your body must deal with waste in space too. During taking 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(冲洗) waste down the toilet. Back on Earth it's flushed away-or sometimes studied by scientists.

　　1．Why are many space foods dried on Earth and stored in special packets?

　　 A．Because they are full of nutrients.

　　 B．Because they are light and hard to break.

　　 C．Because they are easy to carry.

　　 D．Because they are nice to look.

　　解析：细节理解题。根据第二段的Food with all the water dried out is lightweight and doesn't spoil.可知，除去水分变干的食品重量变轻，不易损坏，故选B。

　　答案：B

　　2．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.

解析：细节理解题。根据第三段可知选B。