在控制系统中,既发挥了前馈对主要干扰克服的及时性,又保持了反馈控制能克服多种干扰、保

题型:单项选择题

问题:

在控制系统中,既发挥了前馈对主要干扰克服的及时性,又保持了反馈控制能克服多种干扰、保持稳定性的控制是()。

A、静态前馈

B、动态前馈

C、前馈反馈

D、前馈串级

考点:化工操作工考试化工仪表及自动化部分化工仪表及自动化部分题库
题型:单项选择题

如图所示,当滑动变阻器滑动触头向右移动时,灯泡A、B、C的亮度将(  )

A.都变亮

B..都变暗

C.A、B变暗,C变亮

D.A、B变亮,C变暗

题型:单项选择题

男性,32岁,4天前,用锤子敲打石头时右眼被异物射伤。眼科检查:右眼视力眼前手动,球结膜轻度充血,10点方位角膜见3mm大小全层伤口,伤口水肿,前房深度正常,房水(+),下方积脓1mm.虹膜纹理不清后粘连,10点虹膜中周处有一穿通口,瞳孔4mm×3.5mm,对光反射消失,瞳孔区纤维性膜样渗出,晶状体混浊,看不清视网膜,眼压Tn。

最可能的并发症是().

A.急性葡萄膜炎

B.感染性眼内炎

C.眼内异物

D.外伤性白内障

E.眼铁质沉着症

题型:单项选择题
A report has recently been published about what the earth might be like 20 years or so from now on. The report is a result of a three-year  46 .
According to the report, the picture of the earth in the year 2020 is not a  47 one. The world will be more  48 because the population will continue to grow. The population could be  49 9,000 million, almost 3,000 million more than that in 2009. More people would move into cities, especially cities in  50 countries. Cities in India and Thailand probably would  51 have a population of 20 million by then.
Food production will  52 , but not enough to feed all the people. Farmers will grow 90% more food than they did in 2009,  53 most of the increase would be in countries that  54 produce enough food for their people. Little increase is  55 in South Asia, Africa or the Middle East. Poor farming ways are  56 large areas of cropland, changing farms into deserts. More farmland is  57 as cities become larger and more houses are built.  58 will get worse as developed countries burn more coal and oil. Many of the world’s  59 could disappear as more and more trees are cut down. Energy will continue to be a serious problem. The experts say their  60  of the earth for the year 2020 may be wrong. They only   61  the situation as it is today. By changing the situation, by  62 the problems, the picture can be changed. There is  63 time for the nations of the world to  64 a plan of action. But they considered that  65 too long to make a decision would greatly reduce the chances of success
小题1:
A.learningB.instructionC.noticeD.study
小题2:A.pleased    B.pleasant                  C.safe                         C.blue
小题3:
A.dangerousB.beautifulC.crowdedD.terrible
小题4:
A.no more thanB.as many asC.so much asD.as large as
小题5:
A.developingB.developedC.bigD.mountainous
小题6:
A.noneB.eachC.noD.neither
小题7:
A.lastB.reduceC.increaseD.continue
小题8:
A.soB.butC.orD.however
小题9:
A.alreadyB.hardlyC.partlyD.never
小题10:
A.wantedB.lackedC.foundD.expected
小题11:.
A.destroyingB.protectingC.botheringD.interrupting
小题12:
A.savedB.lostC.discoveredD.used
小题13:
A.Air pollutionB.Water pollutionC.Some diseasesD.All farmland
小题14:
A.animalsB.plantsC.forestsD.people
小题15:
A.photoB.pictureC.aimD.environment
小题16:
A.stoppedB.continuedC.exchangedD.prevented
小题17:.
A.solvingB.working C.answeringD.dealing
小题18:.
A.noB.stillC.lessD.lots of
小题19:
A.give upB.carryC.makeD.get off
小题20:
A.visitingB.suggestingC.spendingD.waiting
题型:单项选择题

下列选项中,不属于人的心理活动中智力因素的有( )

A.动机

B.兴趣

C.感知

D.记忆

E.言语

题型:单项选择题

企业核心能力的载体是______

A.核心人员
B.核心领导
C.核心产品
D.核心资金

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