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单选题
2、第二问
A
All of the important scientific discoveries are the result of serendipity.
B
Serendipity is of no use because science is all about intelligence and hard work.
C
Serendipity can directly generate great scientific inventions.
D
Science doesn’t rely on serendipity but progress in science cannot do without it.
答案解析
正确答案：D
