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举一反三
【多选题】8/6R—AH型介质泵中，“8”代表（），“6”代表（）。
A.
“8”为介质泵吸入口的直径
B.
“8”为介质泵排出口的直径
C.
“6”为介质泵排出口直径
D.
“6”为介质泵吸入口直径
【单选题】One of the most exciting features of the Digital Divide Network website is the ability for every DDN member to have a personal blog(网络日志). Blogs contain journal entries written by the author, who’’s r...
A.
To discuss the impact of blogs on our society.
B.
To promote a new bogging tool.
C.
To introduce several kinds of blogging tool.
D.
To instruct how to write one’’s personal blog.