问题
单项选择题
牙面获得性膜形成后,最初附着于牙面的细菌主要是
A.黏性放线菌
B.变形链球菌
C.唾液链球菌
D.血链球菌
E.轻链球菌
答案
参考答案:D
牙面获得性膜形成后,最初附着于牙面的细菌主要是
A.黏性放线菌
B.变形链球菌
C.唾液链球菌
D.血链球菌
E.轻链球菌
参考答案:D
选词填空。(用方框中所给的词的适当形式填空)(5分)
小题1: I’m ___▲ __ than most of the kids in my class because I exercise everyday. 小题2:Don’t worry about your mother’s ___▲ ____. 小题3:Mary plays tennis ____▲ __ a week. She plays it on Tuesday and Saturday.. 小题4:I really enjoy ▲ at the beach because it is so cool and relaxing 小题5:She is _____▲____ her little brother tomorrow |