题目内容
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[单选题]
圆柱螺旋压缩弹簧的簧丝直径是指：
A.制造弹簧的钢丝直径
B.弹簧的平均直径
C.弹簧的内圈直径
D.弹簧的外圈直径
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第8题
What preparation can you make the night before if you want to get out as soon as possible in the morning?
A、Leave your keys on the table with a lot of items together
B、Don’t recharge your smart phone
C、put all your items in your suitcase and leave it in a handy place
D、clean your shoes in the morning.
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