足月儿的外观特点有（）。
A.胎毛多
B.四肢屈曲
C.乳晕不清
D.女婴大阴唇不能遮住小阴唇
E.男婴睾丸未下降
参考答案：B
The Chinese government is trying to do something to _____ better understanding between the two countries.[ ]
A. widen
B. increase
C. raise
D. promote
USB是通用并行数据接口。( )
