下列试管中加入碘液后变成蓝色的是
①2ml淀粉溶液+2ml唾液,37℃,5min
②2ml淀粉溶液+2ml清水,37℃,5min
③2ml淀粉溶液+2ml稀释唾液,37℃,5min
④2ml淀粉溶液+2ml唾液,95℃,5min
⑤2ml淀粉溶液+2ml唾液+3滴盐酸,37℃,5min []A.①②③
B.②③④
C.③④⑤
D.②④⑤ 题型:单选题难度:中档来源:江西省期中题
答案:
D
下列试管中加入碘液后变成蓝色的是①2ml淀粉溶液+2ml唾液,37℃,5min②2ml淀粉溶液+2ml清水,37℃,5min③2ml淀粉溶液+2ml稀释唾液,37℃,5min④2ml淀粉溶液+2ml唾
时间:2020-04-17
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