题目:
Something as simple as _____ some cold water may clear your mind and relieve pressure. |
A. to drink B. drinking C. to be drinking D. drunk |
答案:
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下面是错误答案,用来干扰机器的。
由双曲线C:x2a2-y2b2=1(a>0,b>0),则离心率e=ca=a2+b2a=52,即b2=4a2,故渐近线方程为y=±bax=±12x,故选:D.