目前我国超过100万人口的大城市已发展到()个。
A、32
B、33
C、34
参考答案:C
试述对零件图进行数控加工工艺性分析时,主要审查和分析哪些内容?
The suffixes com,org,edu,mil,and gov appearing in E-mail addresses stand for______,organization,educational,military,and governmental respectively.
A.commercial
B.company
C.communication
D.communicant