现代组合投资理论认为，有效边界与投资者的无差异曲线的切点所代表的组合是该投资者的（）。
WilliamFaulkneroncesaidthat()isastoryof“lostinnocence,”whichprovesitselftobeanintensificationofthethemeofimprisonmentinthepast.
Thenoiseofthepartystoppedmegetting________________sleep.
WithanappropriaterelativepronounMybrotherspeaksEnglishfluently,________Idon’t.
ltisnecessary___youtocomplywithourshippinginstructions.
Shesat________thetableintherestaurant.