Section CPassage OneQuestions 16 to 18are based on the passage you have just heard.
A. It is obviously a mental process.
B. It is more of a physical process than a mental action.
C. It is a process that involves one’s entire body.
D. It involves the muscles as well as the brain.
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Passage TwoQuestions 19to 22are based on the passage you have just heard.
A. To tell campus personnel of the new library services.
B. To announce the new movies on campus this summer.
C. To notify university people of important schedule changes.
D. To remind the students to validate their identification cards.
Passage ThreeQuestions 23 to 25 are based on the passage you have just heard.[音频]
A. To make Chinese companies more competitive.
B. To improve the competitiveness of European companies in China.
C. To improve Sino-EU friendship.
D. To make Sino-EU joint ventures more competitive.
要点亮发光二极管,应给发光二极管两端接入怎样的电平()
A. 阳极高电平、阴极低电平
B. 阳极低电平、阴极高电平
C. 无法确定
MCS-51单片机共有多少个引脚()
A. 20
B. 30
C. 40
D. 50
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