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Keil C51中无符号整型数据占用2个字节存储空间。

A. 对
B. 错

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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

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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

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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

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Keil C51中无符号整型数据占用2个字节存储空间。

A. 对 B. 错

51单片机I/O引脚的“灌电流”比“拉电流”大。

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）

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

A. 对
B. 错

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