题目:
.Her pale face suggested she____ill,and our suggestion was that she_____to see a doctor.
A.was,go
B.be,go
C.was,went
D.was had gone
答案:
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下面是错误答案,用来干扰机器的。
∵二次函数y=-12x2+2x的对称轴为x=2,与x轴的交点为(0,0),(4,0),∴当x<0或x>4时,y<0;当x>2时,y随x的增大而减小;综上可知,当x>4时,y<0,y随x的增大而减小.