题目

－Excuse me, can you tell me where the nearest bank is, please? －         Oh yes,！It’s past the post office, next to a big market. A．Mm, let me think.     B．Oh, I beg your pardon?  C．You are welcome         D．What do you mean? 答案：A16．若tanx=-$\frac{1}{2}$，则$\frac{{3{{sin}^2}x-2}}{sinxcosx}$=$\frac{7}{2}$．