单选题
Which of the following are true of the first metal coins?
A、
They were made of copper.
B、
They were made of paper.
C、
They were square but with a round hole in the center.
D、
They were round but with a square hole in the center.
【正确答案】
D
【答案解析】
[精解] 细节题。关于最早的金属钱币的描述出现在文中第三段第二句"They were round and had a square hole in the center．"中，这与[D]的描述完全一致，因此[D]为答案。
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