题目内容
（请给出正确答案）
[单选题]
人类从低级阶段向文明阶段发展是从学会 制作开始的。
A.陶器
B.铁器
C.瓷器
D.青铜器
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A、Asia is four times as large as Europe.
B、Asia is three times larger than Europe.
C、Asia is three times the size of Europe.
D、Asia is three times as large as the size of Europe.
