更多“与非门构成的基本RS触发器触发信号是高电平有效。”相关的问题
“有效”的教学策略必须满足的基本条件是（）。
A.利于师生的有效互动 B.能引起学生学习的意向 C.学生明确学习所要达到的目标和所学内容 D.有易于学生理解的教学方式
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每张工程图样中均应画出标题栏(其 尺寸是不需要标注出来的 ),其位置一般在图纸的 。
A. 右下角 B. 左下角 C. 左上角 D. 右上角
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若要设置/tmp/file文件的所有者和所属组用户均有读、写权限,其他用户对该文件只有读的操作权限,以下命令正确的是()。
A. chmod ug=rw 0-w-x /tmp/file B. chown 664 /tmp/file C. chmod u=rw /tmp/file D. chmod 664 /tmp/file
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爬山虎茎的攀援结构是（）
A.茎卷须
B.吸盘
C.叶卷须
D.托叶卷须
E.叶柄
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某班在“每月一星”的活动中，将表现好，进步大的学生照片贴在“明星墙”上以示奖励，这样的方法是______。
A.说服教育
B.品德评价
C.指导实践
D.陶冶政治
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太阳系中除（）外，所有行星都沿着同一方向围绕太阳转动。
A.木星B.天王星C.海王星D.冥王星
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刘某，男，现年32岁，未婚，高中文化程度。祖籍河南．户口迁至上海，故刘某在上海无其他亲戚，
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女性，31岁，2天前感咽部发痒，近1天来声嘶，咳嗽。体检：可见喉部水肿，充血，可闻及喘鸣音，最可能的诊断()
A . A．支气管炎
B . B．病毒性咽喉炎
C . C．肺炎
D . D．流感
E . E．肺结核
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实际电流源模型是由一恒定的电流为Is的理想电流源和代表内阻为R0的电阻元件( )而成。 (5.0分)
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通脉四逆汤主治：（）
A.下利清谷，里寒外热，汗出而厥者 B.呕而脉弱，小便复利，身有微热，见厥者 C.下利腹胀满，身体疼痛者 D.手足厥寒，脉细欲厥者 E.下利后脉绝，手足厥冷，脉不还者
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R12的正常蒸发温度为（）度。
A.-10
B.-15
C.-29.8
D.-35
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In such a changing, complex society formerly simple solutions to informational needs become complicated. Many of life’’s problems which were solved by asking family members, friends or colleagues are beyond the capability of the extended family to resolve. Where to turn for expert information and how to determine which expert advice to accept are questions facing many people today. In addition to this, there is the growing mobility of people since World War II. As families move away from their stable community, their friends of many years and their extended family relationships, the informal flow of information is cut off, and with it the confidence that information will be available when needed and will be trustworthy and reliable. The almost unconscious flow of information about the simplest aspects of living can be cut off. Thus, things once learned subconsciously through the casual communications of the extended family must be consciously learned. Adding to societal changes today is an enormous stockpile (储备) of information. The individual now has more information available than any generation, and the task of finding one piece of information relevant to his or her specific problem is complicated, time-consuming and sometimes even overwhelming. Coupled with the growing quantity of information is the development of technologies which enable the storage and delivery of more information with greater speed to more locations than has ever been possible before. Computer technology makes it possible to store vast amounts of data in machine-readable files, and to program computers to locate specific information. Telecommunications developments enable the sending of messages via television, radio, and very shortly, electronic mail to bombard (轰击) people with multitudes of messages. Satellites have extended the power of communications to report events at the instant of occurrence. Expertise can be shared world wide through teleconferencing, and problems in dispute can be settled without the participants leaving their homes and/or jobs to travel to a distant conference site. Technology has facilitated the sharing of information and the storage and delivery of information, thus making more information available to more people. In this world of change and complexity, the need for information is of greatest importance. Those people who have accurate, reliable up-to-date information to solve the day-to-day problems, the critical problems of their business, social and family life, will survive and succeed. "Knowledge is power" may well be the truest saying and access to information may be the most critical requirement of all people.
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患者，女性，63岁，有胆石症病史15年。上腹部剧痛4小时，呕吐3次，呕吐物中有胆汁。急诊入院，查血白细胞2×109／L，中性粒细胞0．8，怀疑为急性胰腺炎。护士应严密观察的项目不包括
A．生命体征
B．意识变化
C．24小时出入量
D．血、尿淀粉酶
E．大便隐血试验
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