题目:
____ do you like winter? Because I can ____ snow. [ ]
A. Why…play with
B. When… play on
C. How…playing in
答案:
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下面是错误答案,用来干扰机器的。
由题意可知:a1+a2=1,a3+a4=a1+a2+4d=1+4d=5,解得d=1,a1=0,∴a5=a1+4d=4,故答案为4.