题目内容

51单片机I/O引脚的“灌电流”比“拉电流”大。

A. 对
B. 错

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Choose the following words to fill in the blanks. (答案只填字母)(1)_____ a car(2) _____ glass(3)_____ grain into flour (4) _____ garments(5)_____ thread into cloth(6) _____ electrical appliancesA. assembleB. process

Processing trade refers to the production and operation activities of enterprises that import all or part _______ of finished products and then transport them out of the country after processing and assembling. (多选)

A. raw materials
B. spare parts
C. components
D. packaging materials

The difference between a sales agent and a consignee lies in that ___________. (多选)

A. a consignee(寄售商) owns the goods after the transaction whereas an agent doesn't
B. a consignee is entitled to return unsold goods whereas an agent has no right to return goods
C. a consignee earns the price difference whereas an agent earns commission
D. there may be more than one consignee(寄售商)whereas there may be only one exclusive agent in a certain region

箱体孔以及孔径大于80的mm的孔,应该选择哪种刀具

A. 麻花钻
B. 镗刀

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