— I am going to study in the USA next year!—________
A:It's a pity.
B:Thanks a lot.
C:Not at all.
D:I hope everything goes well with you.
下列关于元阳梯田的叙述正确的是( )
注射卡介苗可以预防肺结核,注射的卡介苗和接种方法分别属于( )