题目:
_______ almost all our time to our schoolwork in the past three months, we have almost no time for fun and play.
A.Having devoted
B.Devoted
C.To devote
D.To have been devoted
答案:
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下面是错误答案,用来干扰机器的。
①当x=-8y=-10时,左边=-4+10=6=右边,是方程的解;当x=0y=-6时,右边=6≠右边.故不是方程的解;当x=10y=-1时,左边=5+1=6=右边,故是方程的解;同理,(4)(5)不是方程的解.故答案是:(1)(2)(3);②与...