试题与答案

研究豌豆种子萌发时,将豌豆种子放在培养皿内的棉花上,设置如下四组实验,数天后记录

题型:填空题

题目:

研究豌豆种子萌发时,将豌豆种子放在培养皿内的棉花上,设置如下四组实验,数天后记录发芽情况:

(1)选择_______两组作对比试验,可以研究豌豆种子萌发是否需要水分。

(2)由这四组实验现象可以得出,豌豆种子发芽时肯定不需要_______。

答案:

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答案:D

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                                        A       B      C            D

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                                           A           B                C                   D

( ) __________ 6. The twins look the same  but  their hobbies are different from.

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                                 A       B                     C                            D

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