求语言学两个问题,1-Ofthefollowingsoundcombinations,only_____ispermissibleaccordingtothesequentialrulesinEnglish.A,a:B,e:C,o:B,u这题选A,2-AllthebackvowelsinEnglisharepronouncedwithrounded-lips,i.e.rounded,except____.A

　　求语言学两个问题,

　　1-Ofthefollowingsoundcombinations,only_____ispermissibleaccordingtothesequentialrulesinEnglish.

　　A,a:B,e:C,o:B,u

　　这题选A,

　　2-AllthebackvowelsinEnglisharepronouncedwithrounded-lips,i.e.rounded,except____.

　　A,BB,UC,JD,C

　　这题选A,