既有因数2，又有因数3的数，一定含有因数6。 [ ]
正确
酸蚀刻法复合树脂修复的粘结机制是（）
A.螯合
B.化学键
C.范德华力
D.机械粘结
E.结合共聚
The students are very ________ music.[ ]
A. interesting at
B. interested at
C. interesting in
D. interested in
