It still puzzles today’s scientists some mammals produce their young others lay eggs to produce their offspring A．that; while B．why; while C．how; when D．what; as 题目和参考答案——青夏教育精英家教网—

题目内容

It still puzzles today’s scientists ______ some mammals produce their young ______ others lay eggs to produce their offspring( 后代)

A．that; while

B．why; while

C．how; when

D．what; as

【答案】

【解析】略

练习册系列答案

课课练与单元测试系列答案

世纪金榜小博士单元期末一卷通系列答案

单元测试AB卷台海出版社系列答案

黄冈新思维培优考王单元加期末卷系列答案

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