单选题：Why does an astronaut put his hand under his belt when he s

题目内容：
Why does an astronaut put his hand under his belt when he sleeps? A．Because he thinks it is comfortable to sleep in that way in space.
B．Because he doesn't want to touch any controls when he sleeps.
C．Because the instruments of the spaceship are easily broken.
D．Because he is afraid that the seat will move.

参考答案：
答案解析：

某期货公司为进行广告宣传，新设计印刷了一批宣传材料，并在公司宣传会上进行分发。小王在阅读材料后，对期货投资很感兴趣，电话

某期货公司为进行广告宣传，新设计印刷了一批宣传材料，并在公司宣传会上进行分发。小王在阅读材料后，对期货投资很感兴趣，电话咨询了公司之后，小王决定开户进行期货交易

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