题目内容

设计含有异步复位（低电平有效）和同步计数使能（低电平有效）的模28加法计数器，输出高电平有效。（要求仿真，给出testbench代码和仿真波形图）

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请设计1个5输入带符号数的组合电路加法器，其中输入位宽分别是32位、32位、8位、16位、64位。（要求仿真，给出testbench代码和仿真波形图）

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地基土的分类：

A. 岩石
B. 碎石
C. 砂
D. 粉土
E. 粘性土
F. 填土
G. 耕土

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II. Listening Practice1 Mini-DialoguesListen to the following five mini-dialogues and then, for each question below, select the best answer from among the four choices given.[音频]Where does this conversation most likely take place?

At a marine exhibition.
B. On a fishing boat.
C. At a restaurant.
D. In a fish shop.

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[音频]What do we learn from this conversation?

A. The man went to Australia during Christmas.
B. The man visited Australia during the summer vacation.
C. The man didn’t have a good time because nobody was home.
D. The man remained home while his parents went to see his uncle.

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