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问题 选择题

学习完植物的分类知识后，某同学将海带、葫芦藓和肾蕨归为一类，将莲、柏树和小麦归为另一类．他划分的依据主要是（　　）

A．是否有真正的根

B．能否产生种子

C．是否有输导组织

D．是水生还是陆生

答案

答案：B

填空题

数据的 【2】 结构在计算机存储空间中的存放形式称为数据的存储结构或物理结构。
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单项选择题

Christine Dobbs is watching a public affairs television program on which one of the participants makes the following Statements: Statement 1: A common resource is an obstacle to the efficient allocation of resources unless it generates external benefits. Statement 2: The idea of utilitarianism suggests that market allocation of resources does not maximize the value of an economy to all individuals. However, achieving the results that utilitarianism regards as optimal involves a loss of economic output. Should Dobbs agree or disagree with these statements Statement 1Statement 2（） ①A. Disagree Agree ②B. Agree Agree ③C. Agree Disagree

A. ①

B. ②

C. ③
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