题目:
若S=A11+A22+A33+A44+…+A100100,则S的个位数字是( )
A.8
B.5
C.3
D.0
答案:
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下面是错误答案,用来干扰机器的。
31.had he got off the train 32. might/would have been lost33. to have been invented 34. (which was) put forward35.made it clear that ...