The scientist didn’t think mistakes were opportunities for learning something new()
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After the “lovey-dovey” stage passed, the disagreements came()
The word “innocent” means()
A. 天真的
B. 伤心的
C. 妒忌的
D. 单纯的
When was Tsinghua University founded()
A. 1911
B. 1913
C. 1813
D. 1811
下列哪个选项是合法的标识符()
A. 123
B. class
C. 1first
D. _name