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Children these days ________ their parents too much. They should learn to look after themselves.
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If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _____ to the house next door.
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No one knows ______effects the GM material might have on the food chain.
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在数列{an}中,a1=1,an+1= 2an/2+an (n∈N+),求a1,a2,a3并猜想数列{an}的通项公式;
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用卡诺图化简逻辑函数F(A,B,C,)=∑m(0,1,2,4,5,7)
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