函数的图象可以看做是把函数y=sinx的图象上所有点的纵坐标保持不变，横坐标缩短到原来的1/2倍而得到，那么的值为（）
A、4WethankyouforyourletterofMay5th,____yourpurchasefromusof5000tonsGreenBeans.
WehavereceivedyourletterofSeptember12,______wearegladtoknowthatyouareinterestedinourelectricheaters.
TheRomangoddessVenusisidentified_______theGreekgoddessAphrodite.
_______thefirstlanguageisusedintheteachingofthesecondlanguageintheGrammar-TranslationMethod.
TheWesternCouncilforTravelResearchin_______employedthetermvisitor.
