判断下列单词划线部分的发音是(√)否(×)相同。

( ) 1. perform  hall

( ) 2. mouse  around

( ) 3. can  can't 

( ) 4. music  building

( ) 5. language  lamb

( ) 6. jump  circus

( ) 7. experiment  lab

( ) 8. hers  observe

( ) 9. enjoy  joey

( ) 10. lion  violin

( ) 11. twice  write

( ) 12. building  music