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【单选题】
80C51单片机的VSS(20)引脚是 ______ 引脚。A.
A．主电源+5V
B.
接地
C.
C . 备用电源
D.
访问片外存储器
手机使用
分享
复制链接
新浪微博
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反馈参考答案：
举一反三
【简答题】adj. wanting a lot of information and knowledge; eating or wanting large amounts of food
【简答题】土地增值税实行四级超率累进税率
【判断题】Please judge whether the following statements are True or False. Research is creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of humans, ...
A.
正确
B.
错误
【单选题】祭侄文稿can be properly translated into( )
A.
Draft of the Funeral Address for Author’s Late Nephew
B.
To My Nephew
C.
Elegiac Lament for Departed Nephew
D.
Memorial Nephew Draft
【简答题】A. Why not? B. She's an engineer. C. I'll try my best. D. Is five dollars enough? E. He's my nephew. F. Stop for a rest. G. It's worth seeing. H. Repay the money. 56. Joe: I've left my money in my hou...
【单选题】Knowledge of, and/or training in the English language, both ___, for the satisfactory exchange of communications relevant to the safety of life at se
A.
English and Chinese
B.
French and Sweden
C.
written and spoken
D.
written and visual
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