要用传送指令访问MCS—51片外RAM,它的指令操作码助记符应是()
A. MOV
B. MOVX
C. MOVC
D. 以上都行
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某离心泵型号为100YⅡ-80,若入口管中介质流速为1.5m/s,试估算该泵排量大约为多少m3/h?
在Word2000编辑状态下,只想复制选定文字的内容而不需要复制选定文字的格式,则应()
A. 直接使用粘贴按钮
B. 选择"编辑"→"选择性粘贴"操作
C. 选择"编辑"→"粘贴"操作
D. 在指定位置按鼠标右键
An adviser said in China()course should be developed in some Universities, one year at work, one year college.
A. a sandwich
B. a salad
C. a macaroni
D. a dinner
When the order () is received from the bridge, the main air stop valve in the starting air line should be shut.
A. stand-by engine
B. full ahead
C. finished with engine
D. full away