下载APP
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】Passage Two In 1997, devotees of home electronics eagerly awaited the DVD player, a new device that could play movies without videotape, and with greater clarity. It caught on even faste...
A.
die economic realities of its practicality
B.
robust economic growth
C.
economic problems of hi-tech companies
D.
ignorance of the technology