上位机与plc的通讯是()

题型:填空题

问题:

上位机与plc的通讯是()

考点:计算机科学技术DCS分布式控制系统DCS分布式控制系统题库
题型:填空题

区老干局组团包车旅游,如果增加一辆车,正好每辆车坐12人,如果减少一辆车,正好每辆车坐16人,这个旅游团的人数有______人.

题型:填空题

邱先生在购买保险的时候,发现保险合同中所载明的风险一般是在( )的基础上可测算的且当事人双方均无法控制风险事故发生的纯粹风险.

A.概率论和数理统计

B.概率论和高等数学

C.利息理论和数理统计

D.概率论和利息理论

题型:填空题
完形填空 (共20小题;每小题1.5分,满分30分)
阅读下面短文,掌握其大意,然后从36—55各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。
In some cities, work holism(废寝忘食工作)is so common that people don’t consider it unusual. They accept the lifestyle as    36   . Government workers in Washington, D. C., 37, frequently work sixty to seventy hours a week. They don’t do this because they have to; they do it because they 38    to. Work holism can be a     39    problem. Because true workaholics would rather work than do anything else, they    40    have no idea of how to relax; that is, they might not    41 movies, sports, or other types of entertainment. Most of all, they 42    to sit and do nothing. The lives of workaholics are usually stressful, and this tension and worry can cause   43    problems such as heart attacks and stomach diseases.    44   , typical workaholics don’t pay much attention to their families. Their marriages may end in    45    as they spend little time with their families.
Is work holism    46    dangerous? Perhaps not. There are, certainly, people who work    47 under stress. Some studies show that many workaholics have great energy and interest in work. They feel    48    is so pleasurable that they are actually very happy. For most workaholics, work and entertainment are the same thing. Their jobs    49    them with a challenge; this keeps them busy and creative.
50    do workaholics enjoy their jobs so much? There are several    51    to work. Of course, it provides people with paychecks, and this is important. But it offers    52    financial security. It provides people with self-confidence; they have a feeling of satisfaction   53    they have produced a challenging piece of work and are able to say “I    54    it”. Psychologists claim that their work gives people an identity. After they take part in work, they    55   a sense of self and individualism.
小题1:
A.strange B.boring C.pleasant D.normal
小题2:
A.for exampleB.on the other hand C.what’s more D.after all
小题3:
A.agree B.promise C.dare D.want
小题4:
A.slight B.serious C.obvious D.difficult
小题5:
A.stillB.probably C.certainly D.mostly
小题6:
A.afford B.enjoy C.watch D.allow
小题7:
A.dream B.decideC.intend D.hate
小题8:
A.physical B.cultural C.social D.mental
小题9:
A.Therefore B.However C.Anyway D.Besides
小题10:
A.happiness B.silence C.failure D.loss
小题11:
A.sometimes B.always C.seldom D.hardly
小题12:
A.sadly B.differently C.efficiently D.slowly
小题13:
A.study B.family C.life D.work
小题14:
A.equip B.pack C.provide D.fill
小题15:
A.When B.Why C.How D.Where
小题16:
A.factors B.advantages C.steps D.ways
小题17:
A.no more B.more or lessC.no more than D.more than
小题18:
A.when B.before C.unless D.until
小题19:
A.valued B.failed C.caught D.made
小题20:
A.give B.lose C.get D.need
题型:填空题

儿童最早出现条件反射的时间约在出生后().

A.10~20天

B.8~9天

C.6~7天

D.4~5天

题型:填空题

信息安全中, 【16】 是指在应用层对信息的保密性、完整性和来源真实性进行保护和认证。

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