玉米和大豆是重要的粮食作物．下面对二者的描述科学的是_刷题宝

题干

玉米和大豆是重要的粮食作物．下面对二者的描述科学的是（）

A：玉米是单子叶植物，一粒玉米是由一个胚珠发育来的

B：在玉米传粉季节，因环境因素影响其传粉，可人工辅助授粉

C：大豆粒属于果实

D：玉米茎的加粗是依靠形成层

上一题下一题 0.0难度选择题更新时间:2012-12-24 10:12:02

答案(点此获取答案解析）

B

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