挑战习题
1/5单选题
难度:

1.

根据你的生活经验和所学的化学知识,判断下列做法能达到目的是( )


A

煤炉火上放一盆水,就能防止CO中毒

B

用无色酚酞试液检验溶液是否显酸性

C

用石灰乳与硫酸铜溶液混合配制防治植物病害的波尔多液

D

用燃烧的小木条放入集气瓶中来检验CO2是否集满

提示1:
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正确答案:Qw==
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