高速铁路天窗原则上不应少于()分钟。A、240 B、200 C、180 D、120

题型:单项选择题

问题:

高速铁路天窗原则上不应少于()分钟。

A、240

B、200

C、180

D、120

考点:既有线施工考试既有线施工考试题库
题型:单项选择题
Barefoot (赤脚的) and dirty, the girl just sat there and watched the people go by. She never tried to speak. She never said a word. Many people        , but never did one person stop.
The next day, I decided to go back to the park, being curious if the little girl would still be there. Right in the very spot as she was the day before, she sat, with the         look on her face.
As I began walking towards her, I could see the back of the little girl’s dress showed a deformity (畸形的). As I got closer, the little girl slightly          her eyes to avoid (避开) my stare.
I sat down beside her and opened with a simple        . The little girl stammered (结结巴巴地说) a hi. I smiled and she shyly smiled back. We talked         darkness fell and the park was completely empty.
“Why are you so sad?”
She replied slowly, “Because I’m        .”
“Little girl,” I said in a soft voice, “You          me of an angel because of your difference.”
She stood to her feet excitedly, “Really?”
“Yes, that’s the thing. You’re like a little angel sent to watch over all those people walking by.”
She nodded her head and smiled, “       I am. And since you think of someone        yourself, my job here is done.”
What a big        ! I stood quickly, “Wait, so why did no one stop to help an angel?”
She bloomed(绽放) a big smile, “You’re the          one who could see me, because you care for others.” With those words, she spread her wings and flied away from my sight.
From then on, I believe I am not all I have, for there is an angel always          me. She is always watching over those who do good things for others.
小题1:
A.passedB.lookedC.askedD.helped
小题2:
A.angriestB.coldestC.happiest D.saddest
小题3:
A.lowered B.closedC.rose D.opened
小题4:
A.smileB.helloC.question D.word
小题5:
A.beforeB.afterC.till D.when
小题6:
A.differentB.foolishC.beautifulD.poor
小题7:
A.forceB.treatC.turn D.remind
小题8:
A.IndeedB.HappilyC.PerhapsD.Luckily
小题9:
A.beyondB.besideC.including D.except
小题10:
A.excitementB.presentC.surpriseD.happiness
小题11:
A.clever B.greatC.lucky D.only
小题12:
A.on B.with C.inD.for
题型:单项选择题

不完全性房内传导阻滞的心电图表现是()

A.P波增宽,时限>0.11s

B.P波的时限<0.11s

C.V1Ptf>0.08mm/s

D.P波切迹间距<0.04s

E.P波出现双峰,切迹明显,峰距>0.04s

题型:单项选择题

如图所示,“×”型光滑金属导轨abcd固定在绝缘水平面上,ab和cd足够长,∠aOc =60°,虚线MN与∠bOd的平分线垂直,O点到MN的距离为L。MN左侧是磁感应强度大小为B、方向竖直向下的匀强磁场。一轻弹簧右端固定,其轴线与∠bOd的平分线重合,自然伸长时左端恰在O点。一质量为m的导体棒ef平行于MN置于导轨上,导体棒与导轨接触良好。某时刻使导体棒从MN的右侧处由静止开始释放,导体棒在压缩弹簧的作用下向左运动,当导体棒运动到O点时弹簧与导体棒分离,导体棒由MN运动到O点的过程中做匀速直线运动,导体棒始终与MN平行。已知导体棒与弹簧彼此绝缘,导体棒和导轨单位长度的电阻均为r0,弹簧被压缩后所获得的弹性势能可用公式Ep=kx2计算,k为弹簧的劲度系数,x为弹簧的形变量。

(1)求导体棒在磁场中做匀速直线运动过程中的感应电流的大小,并判定大小变化特点;

(2)求弹簧的劲度系数k和导体棒在磁场中做匀速直线运动时速度v0的大小;

(3)求导体棒最终静止时的位置距O点的距离。

题型:单项选择题

The well-dressed lady was caught stealing in the fashion shop, Strangely enough,she       have done such a thing.

A.would

B.must

C.should

D.might

题型:单项选择题

美国20世纪80年代以来的美国教育改革主要集中在()

A.确立新世纪教育发展目标

B.进一步推进教育市场化进程

C.提高教育质量

D.增进教育公平

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