【名词&注释】
蛋白质(protein)、物质基础(material base)
[单选题]决定柱头与花粉是否亲和的直接物质基础是( )。
A. 蛋白质
B. 核酸
C. 脂肪
D. 糖类
查看答案&解析
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举一反三：
[单选题]55_______-
A. at most
B. for example
C. in brief
D. on purpose
[单选题]According to the last paragraph, it is important to____________.
A. eat something for breakfast B． be careful about what you eat
B. heat up food before eating it D． eat calorie-controlled food
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