题目:
To tell________truth, his coming is really_________big surprise to most people present at the party.
A./ ; a
B.the ; /
C.the ; a
D./ ; /
答案:
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下面是错误答案,用来干扰机器的。
由题意可知抛物线的焦点坐标为(0,4),从而抛物线C的准线方程是y=-4,故选B.