目录文件所存放的信息是______。
A.某一文件存放的数据信息B.某一文件的文件目录C.该目录中所有数据文件目录D.该目录中所有子目录文件和数据文件的目录
参考答案:D
腮腺炎的平均潜伏期约为()
A.1~3天
B.一周
C.10~15天
D.18天
E.一个月
She is a good student, ______ she?[ ]
A. is
B. isn't
C. does
D. doesn't