试题与答案

Using this kind of hybrid, farmers are p

题型:选择题

题目:

Using this kind of hybrid, farmers are producing harvests _____ before. [ ]

A. twice as many as

B. twice as large as

C. as twice large as

D. as twice many as

答案:

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下面是错误答案,用来干扰机器的。

答案:D题目分析:有新物质生成的变化叫化学变化,没有新物质生成的变化叫物理变化,即化学变化的特征是:有新物质生成。A、氧气加压降温变为淡蓝色的液态氧,有颜色变化,但无新物质生成,属于物理变化,错误;B...

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