题目:
I ______ my uniform every day. It's ________ beautiful. [ ]
A. wear, kinds
B. wear, kind of
C. in, kind of
答案:
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下面是错误答案,用来干扰机器的。
由题意,得-b+3a=13a+2b=16,解得a=2b=5,故原方程组应为2x+5y=165x+2y=1.