对新生儿来说，最理想的食物是什么（）
A.母乳
B.进口奶粉
C.高级奶粉
参考答案：A
唐朝初年，下列名称中还未出现的是 [ ]
A．吐蕃
B．回鹘
C．突厥
D．靺鞨
Knowledge and learning are important if we want to be successful, but they may also ______ our thinking.[ ]
A. direct
B. limit
C. change
D. improve
