短信营业厅与省公司及本地网公司的业务支撑系统无缝对接,同时提供()应用。
A.一级
B.二级
C.三级
D.其他
参考答案:B
-What________Betty________in the summer?
-She visited her aunt near the sea. [ ]
A. does ; do
B. did ; did
C. does ; did
D. did ; do
在不考虑文件目录空间时,对一个2M的文件A生成两个硬链接文件B和C之后,此三个文件共占用硬盘数据实际空间约为()。
A.2M
B.4M
C.6M
D.9M