设f(u,v)具有一阶连续偏导数,且满足
又g(x,y)=
参考答案:
解析:
40. —William, what kind of music do you like, rap or jazz?
— _______. I prefer country music.
A.Either will be OK
B.Both will be OK
C.To be honest, neither
D.Generally, I’m not sure
《金匮要略》肺痿病,证属虚热者,治用();证属虚寒者,治用()