问题 单项选择题

一汽车在路面情况相同的公路上直线行驶,下面关于车速、惯性、质量和滑行路程的讨论正确的是()

A.质量越大,它的惯性越大

B.车速越大,它的惯性越大

C.车速越大,刹车后滑行的路程不一定越长

D.刹车后滑行的路程越长,惯性越大

答案

参考答案:A

解析:质量是衡量惯性大小的唯一因素,质量越大,惯性越大,惯性与物体的运动性质无关,只与物体的质量大小有关,A正确,BD错误;汽车刹车问题过程中末速度为零,根据可逆性可得可得车速越大,滑行距离越大,C错误

单项选择题 A1/A2型题
完形填空
Recently, we went on a vacation for a week that involved visiting four different ports in the sunny and warm climate of the Caribbean. There were         of laughter, fun and great food. It’s a        thing when you go away that each day of the vacation also        to the end and a return to work.
It was twelve years since we went on a vacation, so this vacation was viewed with        of a great break away from my daily routine. And we weren’t        .
But there was something very different about this vacation compared to those when we worked in a corporative environment. The main       was that when we returned, when the vacation was rapidly drawing to a close, we didn’t have the same feeling of     stress, anxiety and fear.
In this recent vacation, it wasn’t that we        enjoyed the various fun and new activities, the break away from routine, the pleasure of touring different countries and cultures, the         to do what we wanted when we wanted or the leisurely      of each day that was significant. What was significant was that we didn’t       fear the last day of vacation. You see, we know that we were        what we love to do not what we had to do.
The feelings experienced in the last couple of days of vacation were viewed with the same joy as the very first days. In the previous times, the last days of vacation were terrible. We experience an increasing        of stress      we knew that a return to our field of employment was “work” and not        that we loved and thoroughly enjoyed.
The        is this: If you do what you love, it doesn’t matter       that a vacation has to end. If you love what you do you will not        yourself wishing for even a few more days of vacation, or wishing that you could      enjoying this vacation for much, much longer. A love of what you do        you back like a magnet.
小题1:
A.moments B.possibilities C.situations D.ways
小题2:
A.discouraging B.bitter C.wonderful D.funny
小题3:
A.come up B.count downC.give out D.die away
小题4:
A.expectation B.attempt C.opinion D.demand
小题5:
A.satisfiedB.tiredC.disappointed D.optimistic
小题6:
A.advantageB.problem C.differenceD.drawback
小题7:
A.approachingB.relieving C.bearing D.overcoming
小题8:
A.necessarily B.thoroughly C.relaxinglyD.smoothly
小题9:
A.opportunity B.desire C.possibility D.right
小题10:
A.pattern B.paceC.lifestyleD.atmosphere
小题11:
A.yetB.stillC.also D.even
小题12:
A.returning to B.submitting to C.turning to D.heading for
小题13:
A.number B.knowledgeC.sense D.awareness
小题14:
A.although B.and C.because D.if
小题15:
A.anything B.everything C.nothing D.something
小题16:
A.lesson B.idea C.pointD.solution
小题17:
A.in the least B.for a moment C.after all D.at the moment
小题18:
A.let B.find C.make D.catch
小题19:
A.maintain B.risk C.keep D.stop
小题20:
A.draws B.holds C.pushes D.welcomes