题目内容

Why did the area that the Laron people settled in remain isolated for so long? (starting line 57)

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Why did Freddy Salazar have the seat of his car raised?(starting line 64)

Why did Luis Sanchez and his friends laugh when they were asked about the latest reports about Laron syndrome? (starting line 64)

Why didn't Salvatore Caruso go to Russia 88 years ago?(starting line 109)

单管气举分为?

A. 开式
B. 半闭式
C. 半开式
D. 闭式

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