题目内容

十进制数129.75对应的二进制数是（）

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-17的8位原码（）

-17的8位补码是（）

Directions: Listen to a conversation and choose the best answer from the four choices provided for each question. 1. A) He was thinking about his studies.B) He was thinking about his future.C) He was thinking about his brother.D) He was thinking if he could get a job.2. A) He is unhappy and hates his job.B) He doesn’t have a college degree.C) He has to spend much time working.D) He never wants to do something fun.3. A) To work hard to get an ideal job.B) To get a job right after graduation.C) To be more realistic to face his life.D) To take a break before starting a job.4. A) To take a one-year break after graduation.B) To learn things he can’t learn from a book.C) To have a balanced life with work and rest.D) To travel to the places he has never been to.

牙周组织中的糖胺聚糖中有一个是氨基糖，一个是葡萄糖醛酸

A. 对
B. 错