问题 选择题

下列物体的运动状态没有发生改变的是( )

A.刚离开发射塔升空的火箭

B.围绕地球做匀速圆周运动的神州八号飞船

C.定点在地球赤道上空的同步卫星

D.游乐场里从斜直滑梯上正在匀速下滑的小孩

答案

答案:D

物体的运动状态包括物体的速度大小和速度的方向,只要其中一个发生变化,则物体的运动状态就发生了变化,刚离开发射塔升空的火箭正在加速中,速度大小在增大,所以火箭的运动状态发生了变化,围绕地球做匀速圆周运动的神舟八号飞船的速度方向在时刻发生变化,所以飞船的运动状态也发生了变化。同理同步卫星的速度方向也在变化,所以同步卫星的运动状态也在变化,游乐场里从斜直滑梯上正在匀速下滑的小孩的速度大小和方向都不变,所以小孩的运动状态不发生变化,选D

听力题

请根据字面提示与句意,用必修3Unit1-5中所学新词、短语的适当形式将小题中的句子补充完整。

小题1:I made an a_______ to him because I broke his bicycle.

小题2:Dad gave us a lecture about our table m_______.

小题3:Ancient people had different ways to explain how the world came into e_______.

小题4:The journey took a_______ two weeks. Maybe longer, but I can’t be sure.

小题5:The carpet m_______ 6 by 6 metres, so it has an area of 36 square metres.

小题6:The new owners have tried to give the restaurant a more family-friendly _______(气氛).

小题7:I’m sorry to bother you, but I have several questions to _______(咨询) you.

小题8:Columbus discovered America but did not explore this _______(大陆).

小题9:I'd like to _______(确认) our appointment at 3:30 p.m. Friday in your office.

小题10:The author deals with the problem of _______(暴力) among teenagers in the first few chapters.

小题11:Sir, you’re not allowed to enter the building if you don’t get our manager’s _______(permit).

小题12:_______(forgive) does not change the past, but it does enlarge the future.

小题13:A distant journey tests the _______(strong) of a horse and a long task proves the character of a man

小题14:She was a quick learner and adapted to the new _______(surround) well.

小题15:I found most of the characters in the play totally _______(believe), because they were not real..

小题16:约翰无法解释他没来学校的原因。

John could not ______ ______ his absence from school.

小题17:牛顿好奇苹果为何向下落而非向上飞。

Newton ______ ______ ______ what made the apple fall "downwards" instead of "upward".

小题18:人们经常谈到怎样在工作与个人生活间保持平衡。

People often talk about how to ______ ______ ______ ______ work and personal life.

小题19:定居温哥华以前,她是伦敦经营自己的古董店。

Before she ______ ______ in Vancouver, she had run her own antiques shop in London.

小题20:您在本照相馆的每一张留影,都将给您带来温馨与甜蜜的回忆。

Every photo taken in this studio will ______ ______ ______ the warm and sweet past.

小题21:Undoubtedly, exercise like walking has benefited many patients.

=" Undoubtedly," many patients ______ ______ ______ exercise like walking.

小题22:--Have you got any idea ______ the party is to be held?

-- This Friday night. Do you know ______ Sandy knows it?

小题23:We should learn ______ before a problem can be solved, it must be obvious ______ the problem itself is.

小题24:______ the town is no longer ______ it used to be is very obvious.

小题25:What makes me puzzled is ______ told him the news ______ the sports meeting was put off.

多项选择题