一个CAN总线接口有3个部分组成,它们分别对应于CAN总线的物理层、数据链路层和应用

题型:单项选择题

问题:

一个CAN总线接口有3个部分组成,它们分别对应于CAN总线的物理层、数据链路层和应用层。最上层为(),主要负责上层应用以及系统控制,包括CAN协议的应用层协议的实现,协调各系统设备的工作。

A.微处理器

B.微控制器

C.CAN控制器

D.CAN收发器

考点:船舶电气与自动化船舶计算机及网络基础船舶计算机及网络基础题库
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2x和x2表示的意义相同.______.(判断对错)

题型:单项选择题

A few months before I was born, my Dad met a stranger who was new to our small town. From the beginning, Dad was fascinated with this enchanting newcomer and soon invited him to live with our family. The stranger was quickly accepted and was around to welcome me into the world a few months later.

As I grew up, I never questioned his place in my family. In my young mind, he had a special position. My parents were complementary instructors:Mom taught me the words, and Dad taught me to obey them. But the stranger... He was our storyteller. He would keep us spellbound for hours on end with adventures, mysteries and comedies(喜剧).

If I wanted to know anything about politics,history or science,he always knew the answers about the past, understood the present and even seemed able to predict the future! He made me laugh, and he made me cry. The stranger never stopped talking, but Dad didn't seem to mind.

I now know that my early concepts about relationship were influenced strongly by the stranger. Time after time, he opposed the values of my parents, yet he was seldom blamed...and NEVER asked to leave.

More than fifty years have passed since the stranger moved in with our family. He has blended(融合) right in but is not nearly as fascinating as he was at first. Still, if you were to walk into my parent's room today, you would still find him sitting over in his corner, waiting for someone to listen to him talk and watch him draw his pictures. His name?

We just call him...“TV”.

He has a younger sister now. We call her “Computer”.

小题1:When the stranger came to live with our family, he was ________.

A.ignored by the children

B.driven away for no reason

C.abandoned because it was too noisy

D.accepted by every family member小题2:The stranger can do all the following things EXCEPT that he can ________.

A.tell us some funny stories

B.reject our proposals(提议)

C.influence the children's character

D.predict the future小题3:The underlined word “spellbound” in Paragraph 2 most probably means ________.

A.concentrated

B.puzzled

C.fascinated

D.astonished小题4:What can we learn from the last three paragraphs of the passage?

A.The computer is more advanced and has gained greater popularity.

B.Old as he is,we like the stranger best.

C.The TV set is out of fashion and often breaks down.

D.We decide to throw the TV set away immediately.

题型:单项选择题

肾脓肿的超声表现,下列哪项是错误的()

A.患肾增大

B.局部肾实质回声减弱

C.类圆形、圆形无回声暗区

D.病灶内无回声区内可见点状回声

E.肾脓肿影像学检查应以超声作为首选

题型:单项选择题

智能浮筒液位变送器的调校方法有哪能几种?

题型:单项选择题

男性,30岁。1小时前从2m高处跌落,左腰部着地,伤后腰痛并有肉眼全程血尿和小血凝块。查体:P100次/分,BP110/70mmHg。左腰部青紫压痛明显。

如患者经保守治疗10天,持续有血尿存在(肉眼血尿与镜下血尿交替出现),血压始终维持在110/75mmHg上下,心率波动在70~90次/分范围,腰部无隆起,腹部未见阳性体征。血常规:WBC8×10/L,Hb75g/L,肾功能正常。该患者较适宜采取哪种诊疗方法()

A.继续保守治疗

B.经第11肋间切口肾切除术

C.经腹行肾切除术

D.选择性肾动脉造影+栓塞术

E.腹腔镜探查

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