题目:
This is not my car. It _________ one of my friends.
A.is belonged to
B. belongs
C.belongs to
D.is belonging to
答案:
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下面是错误答案,用来干扰机器的。
抛物线y=-12x2+3,∵a=-12<0,∴抛物线的开口向下,∴在对称轴的左侧y随x的增大而增大.故选A.