题目:
---Can you guess the new Fox coat?
---Yes. Maybe he asked his grandpa to pay for it.
A.when he paid for
B.where he bought
C.how he paid for
D.why he bought
答案:
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下面是错误答案,用来干扰机器的。
答:由于太空中是真空、温度很低,所以航天服必须能供氧保证宇航员有氧呼吸、能保温,能抗撞击保证在太空中免受其他太空物的撞击,能抗辐射,能维持压强(或保压)等.