二进制数110010010对应的十六进制数可表示为()。 A.192H B.C90

题型:单项选择题

问题:

二进制数110010010对应的十六进制数可表示为()。

A.192H

B.C90H

C.1A2H

D.CA0H

考点:单片机原理及应用单片机原理及应用题库
题型:单项选择题

下列反应不可用于设计原电池的是(    )。

A.2CH3OH+3O22CO2+4H2O

B.NaOH+HCl = NaCl+H2O

C.Zn+2HCl = ZnCl2+H2

D.4Al+3O2+6H2O = 4Al(OH)3

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Stephen would take my literature lesson. After we introduced ourselves to each other, we talked about what the class would cover and all the things he would learn. It was a course in which he would learn a lot of facts and details in one term. As I talked, I saw Stephen’s eyes getting big with fear.

I told him to do his assignments (作业) and hand them in on time. I also told him that most successful students made a calendar of all the assignments so they could plan their work load.

As the fall term went by, I learned more of Stephen’s story. He had struggled in school. It had taken him longer to finish than most young people. Family members, including his mother, kept reminding him that he was a failure. But he kept at it. He told me that before coming to our school, no one had believed he had much potential (潜力).

Stephen didn’t become an “A” student. His name didn’t appear on any honors list. One reason was that he never did real well on tests. Still, he managed to pass most of his courses by being in class every day, turning in all of his assignments on time and breaking down his studying into bite-sized digestible portions (易理解的部分). By passing course after course he began to gain a measure of self-esteem (自尊). He was a great singer and he was on the school’s cross-country team.

Every time I saw him at school he would say, “One bite at a time.” His secret, he said, was that he was practicing what I taught him before classes ever started: “Take it one bite at a time.”

On graduation day, he said with a bright smile, “One bite at a time.”

65. Before Stephen began his class, _____.

A. the author had known him for a long time

B. the author told him something about his lessons

C. he was confident about his studies

D. he made a study plan

66. From the passage we can know that Stephen’s family _____.

A. kept encouraging him to continue his studies

B. thought he had much potential to study well

C. didn’t think he would do well at school

D. thought it would take him more time to study than others

67. What do we know about Stephen?

A. He was honored for his good results.    

B. He didn’t do anything except study.

C. He only broke down his literature lesson into bite-sized portions.

D. He tried his best to pass his courses.

68. Which of the following can best describe Stephen’s story?

A. Nothing is difficult to a willing heart.

B. A friend in need is a friend indeed.

C. Well begun, half done.

D. Failure is the mother of success.

题型:单项选择题

女性,26岁。以浮肿,发热1个月入院。体检:贫血貌,血压稍增高,血肌酐140μmol/L,血清补体C3降低,血清抗核抗体阳性,抗ds-DNA抗体阳性( )

A.IgA肾病
B.原发性肾病综合征
C.紫癜性肾炎
D.急进性肾炎
E.狼疮性肾炎
下列病例最可能的诊断是

题型:单项选择题

以最少的投入获得最大的产出,以最少的人力完成成本管理工作体现了施工项目成本管理的( )原则。

A.成本管理科学化

B.成本管理有效化

C.成本管理责任制

D.成本最优化

题型:单项选择题

从多普勒频移公式可知,频移随θ角的增大而()

A.增大

B.减少

C.不变

D.没有定向的变化

E.在小范围内波动

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