题型:阅读选择 题类:真题 难易度:普通
广东省东莞市2020年中考英语试卷
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 (混乱)
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(分离仓)that help shut out some of the light. Sill, studies have found that most astronauts only sleep about six hours each night, even though they should have eight and a half hours.
Brain changes
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 returning 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.
practise, conversation, remember, mistake, good |
English is one of the main subjects in middle schools in China. The {#blank#}1{#/blank#} way of learning it is using it. You need to {#blank#}2{#/blank#} speaking English every day. Don't be shy when you speak English in class. It's also a good idea to start a {#blank#}3{#/blank#} with foreigners. Before you begin, you can smile at them. And don't be afraid of making {#blank#}4{#/blank#} . It's quite natural.
{#blank#}5{#/blank#}: Use English or lose English. Just try and you are sure to make progress soon.
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