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【简答题】
Read the following passage. Answer the questions below each text by choosing A, B, C or D. I find it wholesome to be alone the greater part of the time; to be in company, even with the best, is soon wearisome and dissipating, and I never found a companion so companionable as solitude ( being alone ). We are for the most part more lonely when we go abroad than we stay in our chambers, for solitude is not measured by the miles of space that intervene between a man and his fellows. The farmer, who can work alone all day without feeling lonesome, but must recreate with others at night, wonders how the student can sit alone at night; he does not realize that the student, though in the house, is actually at work in his field and chopping his wood as the farmer was in his. Society is commonly too cheap. We meet at very short intervals, not having had time to acquire any new value for each other; we meet at meals three times a day and give each other a new taste of that musty old cheese that we are; we live thick and are in each other’s way, and I think that we thus lose some respect for one another. We have had to agree on a certain set of rules, called etiquette and politeness, to make this frequent meeting tolerable; certainly less frequency would suffice for all important and hearty communications between men. It would be better if there were but one inhabitant to a square mile, as where I live, for as the value of a man is not in his skin, we need not touch him.
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【多选题】下面是关于单稳态触发器工作特点的描述,正确的是 。
A.
没有触发脉冲时,电路处于一种稳定状态;
B.
在触发脉冲作用下,电路会进入另一个稳定状态;
C.
电路在暂稳态持续一段时间后会自动回到稳态;
D.
电路处于稳态的时间取决于电路中的 RC 参数值;
E.
单稳态电路适合用于存储二进制数值信息;
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A.
测量精度高
B.
所测出的是转速的平均值
C.
其计数器的打开和关闭是由人工控制的
D.
其定时的时间间隔为3s或6s
【多选题】关于定时式转速表的特点,下面说法中正确的是( )。
A.
测量精度高
B.
所测出的是转速的平均值
C.
其计数器的打开和关闭是由人工控制的
D.
其定时的时间间隔为3s或6s
【多选题】下面关于定时器的特点,正确的是?
A.
定时器模块可触发ADC采集
B.
在调试时,微控制器CPU暂停时可以设置定时器也暂停工作
C.
每个定时器有对应的uDMA触发通道
D.
定时器的时钟源只能是系统主时钟
【判断题】假如你想赞美你的一个朋友,公开赞美比你们私下赞美效果更好。
A.
正确
B.
错误
【单选题】关于定时式转速表的特点,下面说法中不正确的是______。
A.
测量精度高
B.
所测出的是转速的平均值
C.
其计数器的打开和关闭是由人工控制的
D.
其定时的时间间隔为3秒或6秒
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A.
正确
B.
错误
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A.
正确
B.
错误
【判断题】国家基本药物就是那些能够满足大部分人口卫生保健需求的药物。
A.
正确
B.
错误
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