设函数y=sinx^2+2x，求dy.
Thistest________anumberofmultiplechoicequestions.
Thedetailedanalysesofthirdandfourthquartersalesareincludedin___finalreport
RegisteryournameandaddressontheWebsiteinorderto____apurchaseonline.
You'veonlygotaslightcold.You'll_____itinadayortwo.
