正确答案: A

小穗

题目：禾本科植物的花序(如稻的圆锥花序)是以( )为基本单位的。

解析：A

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举一反三的答案和解析：

[单选题]For many years, people electric cars. However, making them has been more difficult than predicted.

have dreamed of

[单选题]世界上第一个由民族国家走向超国家共同体的是

欧盟 石油输出国组织 东盟 北美自由贸易区

解析：【解析】东盟和欧盟虽然都是具有超国家性质的组织，但是东盟没有超越国家权力的机构。欧盟有统一的议会和法院，是各区域组织中一体化程度最高的。

[单选题]What did Henry learn from the newspaper that day ?

A man stole money from a bank .

[单选题]I'm tired out. I all afternoon and I don't seem to have finished anything.

have been shopping