异步输入引脚是指受时钟信号控制的引脚，同步输入引脚是指不受时钟信号控制的引脚。
查看答案
Directions: In this section, you'll hear some long conversations. At the end of each conversation, some questions will be asked. Both the conversation and the questions will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D.Question 7 is based on the conversation you have just heard.
A. She is strongly for it.
B. She thinks it is of little use to the people.
C. She thinks it poses a threat to people's life.
D. She thinks it has both advantages and disadvantages.
Questions 8 is based on the conversation you have just heard.
A. He is strongly against it.
B. He thinks it is the best hope for the future.
C. He thinks it is clean but dangerous to the population.
D. He thinks it will completely replace oil and gas resources in the future.
Questions 9 is based on the conversation you have just heard.
A. The man and the woman finally reach an agreement.
B. The man finally convinces the woman of his point.
C. The woman finally convinces the man of her point.
D. The man and the woman cannot convince each other.
Questions 10 is based on the conversation you have just heard.
A. What the future of the Internet will be like.
B. What areas of life the Internet will affect.
C. Why so many people are influenced by the Internet.
D. How the Internet development has benefited him personally.
微信支付 
支付宝支付