Unit 4
Reading1
Life on Mars
.
1. To learn something about life on Mars2. To learn the words and phrases in this passage
.
Words and
Expressions
Marshelmetair tankdried foodpower packsleeping baggravity
n. 火星n. 头盔n. 氧气罐n. 干粮n. 电源包n. 睡袋n. 重力
.


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