从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并标在试卷的相应位置。
16. -Have you heard_____ news? The price of _____ petrol(汽油) is going up again!
A. the ;the B. /; the C. the; / D. /; /
第二节 听下面3段对话,每段对话后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。每段对话读两遍。(共10小题; 每小题1分,满分10分)
听第 6 段材料, 回答第6至8题.
6. How does the woman like her travelling?
A. She is tired. B. She thinks it boring. C. She enjoys it very much
7. Where does Sally want to go?
A. Yunnan province. B. Mount Emei. C. Leshan Grand Buddha.
8. Who do you think the woman is?
A. The man’s wife. B. The man’s friend. C. The man’s daughter.
听第7段材料, 回答第 9至11 题.
9. What did the woman see the man doing every morning?
A. Playing football. B. Playing basketball. C. Playing volleyball.
10. Who will the man’s class play against?
A. Class Two. B. Class Three. C. Class Four.
11. What will the woman do next Sunday afternoon?
A. She will stay at home. B. She will cheer Michael on.
C. She will go to see Michael practise.
听第8段材料, 回答第 12至15 题.
12. Why does the woman make the call?
A. She wants to make friends. B. She hopes to go to France.
C. She hopes to know more about the club.
13. What activity does the club have on Thursday?
A. Sports. B. Parties. C. Evening classes.
14. What special will the woman get if she joins at once?
A. Form. B. The first month free. C. More information.
15. How does the woman feel about the club?
A. It is wonderful. B. It is disappointing. C. It is just so-so.
第一节 听下面5段对话,每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。每段对话仅读一遍。(共5小题; 每小题1分,满分5分)
1. What does the woman mean?
A. Her cousin will sleep in another room. B. Her cousin will share the room with her.
C. Her cousin doesn’t like to stay with her.
2. How does the woman think of the boys’ job?
A. She is not sure. B. She is satisfied with the boys’ job
C. She is not satisfied with the boys’ job.
3. What is the woman?
A. A saleswoman B. A teacher C. A nurse
4. Where are the two speakers?
A. In a field. B. In their bedroom. C. In a supermarket.
5. How many novels does the woman usually read each semester(学期)?
A. Two. B. Three. C. Five.
22.(14分)如图所示,某滑板爱好者在平台上滑行,他水平离开平台边缘A点时的速度vA=4.0m/s,恰能无碰撞地沿圆弧切线从B点进入光滑竖直圆弧轨道,并沿轨道滑行.C为轨道的最低点,B、D为轨道与水平地面的连接点.在滑到D点时,突然用力,使滑板变成沿水平地面继续滑行s=8.0m后停止.已知人与滑板可视为质点,其总质量m=60.0kg,沿水平地面滑行过程中所受到的平均阻力大小Ff=60N,空气阻力忽略不计,轨道半径R=2.0m,轨道BCD对应的圆心角θ =74°,g取10m/s2,cos37°=0.8,sin37°=0.6.求:
(1)人与滑板在B点的速度大小;
(2)运动到圆弧最低点C时对轨道的压力;
(3)人和滑板与水平地面在D点相互作用过程中损失的动能.
21.(12分)国际空间站是迄今最大的太空合作项目,可供宇航员在其上居住和科学实验,它在离地面高度为h的轨道上绕地球作匀速圆周运动.如果规定物体在离地球无穷远处势能为0,则质量为m的物体离地心距离为r时,具有的万有引力势能可表示为
,G是万有引力常量,M为地球质量,地球半径为R.求:
(1)空间站绕地球运行的速度多大?
(2)如果在地面上直接发射一艘质量为m的宇宙飞船,使其恰好直接与空间站对接,则该宇宙飞船刚离开地面时必须具有多大的动能?(不考虑地球的自转)
18.用如图(甲)所示的装置,探究功与物体速度变化的关系.实验时,在平衡摩擦力后将小车静止释放.小车被橡皮筋弹出后沿木板滑行,
并带动通过打点计时器的纸带,记录其运动情况.若实验做了n次,每次小车都从同一位置静止释放,选用相同的橡皮筋根数分别为1根、2根……n根,通过纸带求出小车的速度分别为v1、v2……vn,用W表示橡皮筋对小车所做的功.
(1)关于橡皮筋做功,下列说法正确的是 ▲
A.橡皮筋做功的具体值可以直接测量
B.橡皮筋在小车运动的全程中始终做功
C.通过增加橡皮筋的条数可以使橡皮筋对小 车做的功成整数倍增加
D.若橡皮筋伸长量变为原来的2倍,则橡皮筋做功也增加为原来的2倍
(1)重物由O点运动到C点时,重物的重力势能的减少量△EP = ▲ J,此过程中物
体动能的增加量△Ek = ▲ J.(保留三位有效数字)
(2)一般情况下物体动能的增加量 ▲ 重力势能的减少量(填“大于”、“等于”、
“小于”).你认为,产生这种结果的一个可能原因是 ▲ .
17.为了研究物体的平抛运动,可做下面的实验:如图所示,用小锤打击弹性金属片,A球水平飞出,同时B球被松开,由静止开始下落,且两球同时落到地面.把整个装置放在不同高度,重新做此实验,结果两小球总是同时落地.此实验说明了A球在竖直方向做 ▲ 运动.若两球的质量一样,则落地前的瞬间,两球的重力功率关系为PA ▲ PB(填“>”、“=”或“<”)
16.如图所示,质量为m的汽车,在半径为20m的圆形的水平路面上行驶,最大静摩擦力是车重力的0.5倍,为了不使轮胎在公路上打滑,汽车速度不应超过 ▲ m/s(g=10 m/s2).
15.如图为翻滚过山车的模型. 弧形轨道的下端与半径为R的竖直圆轨道相接,使质量为m的小球从离地面竖直高度为H的弧形轨道A端静止滚下,小球进入轨道下端后沿圆轨道运动.实验发现,只要H大于一定值,小球就可以顺利通过圆轨道的最高点A.如果小球通过A点时的速度大小为v,不考虑摩擦等阻力,下列关系式正确的是
A.
B.
C.
D.
14.运动员以大小为v0与水平方向成θ角的初速度斜向上推出铅球(不计空气阻力),在从刚离手到落到地面的过程中,
A.铅球的加速度不断变化 B.铅球落地速度大小与θ角无关
C.铅球达到最高点时速度沿水平方向 D.铅球达到最高点时速度等于零