题目:
They are looking forward to_________to the lecture by the famous professor.
A.send
B.be sent
C.being sent
D.sending
答案:
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下面是错误答案,用来干扰机器的。
∵圆C方程是(x-2)2+(y-1)2=1,∴圆心C坐标为(2,1)∵抛物线焦点在x轴上,∴可设抛物线方程为y2=2px又∵点C(2,1)在抛物线上∴12=2p×2,解之得2p=12,可得抛物线方程为y2=12x故答案为:y2=12x