空气洁净处理的对象为( )。 A.大气尘 B.对室内环境控制产生影响的污染物质

题型:单项选择题

问题:

空气洁净处理的对象为( )。

A.大气尘
B.对室内环境控制产生影响的污染物质
C.工业尘
D.沉降尘

考点:注册公用设备工程师暖通空调专业知识暖通空调专业知识
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某次高速列车正以v1=216km/h的速度运行,为确保安全,在铁路与公路交叉的道口处需装有自动信号灯.当列车还有一段距离才到达公路道口时,道口应亮出红灯,警告未越过停车线的汽车迅速制动,已越过停车线的汽车赶快通过.如果汽车通过道口的速度v2=

36km/h,停车线至道口栏木的距离x0=5m,道口宽度x=26m,汽车长l=19m(如图所示),并把火车和汽车的运动都看成匀速直线运动.问:列车离道口的距离L为多少时亮红灯,才能确保已越过停车线的汽车安全驶过道口?

题型:单项选择题

脑卒中最重要的和独立的危险因素()

A.高血压

B.心脏病

C.糖尿病

D.高脂血症

E.高同型半胱氨酸血症

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A Love Note To My Mom
When I was a little girl, I would often follow you as you modeled (做模特) for fashion magazine. It was years later that I finally understood what role modeling   in your life. I know little that you were     every penny you earned to go to       school.
I cannot thank you enough for  you told me one autumn afternoon when I was nine. After finishing my homework, I wandered into the dining room where you were buried   piles of law books. I was     .Why were you doing what I do—memorizing textbooks and studying for    ? When you said you were in law school, I was more puzzled. I didn’t know Moms     be lawyers too. You smiled and said,“In life, you can do anything you want to do.”
Though I was young, your words kept     in my ears. I watched as you faced the     of completing your studies, starting companies with Dad, while still being a     and a Mom of five kids. I was tired just watching you     . With your wise words in my      mind, I suddenly felt free to dream. My whole world    . I set out to live my life filled with     , seeing endless possibilities for personal achievements.
Your words became my motto. I     found myself in the position of being either the first (woman doctor in Maryland Rotary)       one of the few women (top medical reporters) in my field. I gained strength every time I said , “Yes, I’ll try that.”
Encouraged by your     , I have forged ahead (毅然前行) with my life’s journey, less afraid to make mistakes, and      meeting each challenge. You did it, and now I’m     it. Sorry, got to run. So much to do, so many dreams to live.
小题1:
A.foundB.playedC.keptD.provided
小题2:
A.savingB.makingC.givingD.receiving
小题3:
A.businessB.fashionC.lawD.medical
小题4:
A.whatB.thatC.whichD.where
小题5:
A.atB.toC.uponD.under
小题6:
A.pleasedB.worriedC.puzzledD.disappointed
小题7:
A.roleB.testsC.positionsD.shows
小题8:
A.mustB.ought toC.needD.could
小题9:
A.ringingB.floatingC.fallingD.beating
小题10:
A.choicesB.chancesC.challengesD.changes
小题11:
A.professorB.doctorC.reporterD.model
小题12:
A.in dangerB.in actionC.in troubleD.in charge
小题13:
A.weakB.powerfulC.youthfulD.empty
小题14:
A.came backB.closed downC.went byD.opend up
小题15:
A.hopeB.hardshipC.regretD.sadness
小题16:
A.oftenB.rarelyC.hardlyD.nearly
小题17:
A.and B.butC.orD.for
小题18:
A.understandingB.wordsC.praiseD.introduction
小题19:
A.secretlyB.curiouslyC.carelesslyD.confidently
小题20:
A.doingB.consideringC.correctingD.reading
题型:单项选择题

目前实施营业税改征增值税改革试点的城市数量是()。

A.1

B.2

C.3

D.4

题型:单项选择题

我国心理学家通常将11、12至14、15岁的年龄时期,称为()。

A.童年期

B.少年期

C.青年期

D.中学生期

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