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20.如图所示,某空间存在正交的匀强磁场和匀强电场,电

场方向水平向右,磁场方向垂直纸面向里,一带电微粒

由a点进入电磁场并刚好能沿ab直线向上运动,下列

说法正确的是

    A.微粒一定带负电            B.微粒动能一定减小

C.微粒的电势能一定增加     D.微粒的机械能一定增加

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19.“借助引力”技术开发之前,行星探测飞船只能飞至金星、火星和木星,因为现代火箭技术其实相当有限,不能提供足够的能量,使行星探测飞船直接飞往更遥远的星体.但如果“借助引力”,可使行星探测飞船“免费”飞往更遥远的星体.如图为美国航空天局设计的“卡西尼”飞船的星际航程计划的一部分图形.当飞船接近木星时,会从木星的引力中获取动量,当飞船离开木星后,也会从木星的引力中获取动量,从而可飞抵遥远的土星.由此可知以下说法正确的是 

A.飞船由于木星的吸力提供能量,机械能大大增加

B.木星会因为失去能量而轨迹发生较大改变

C.飞船受到太阳的引力一直比受到木星的引力小

D.飞船飞过木星前后速度方向会发生改变

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18.如图所示,小车上有一定滑轮,跨过定滑轮的绳上一端系一重球,另一端系在弹簧秤上,弹簧秤固定在小车上.开始时小车处在静止状态.当小车匀加速向右运动时

A.弹簧秤读数及小车对地面压力均增大

B.弹簧秤读数及小车对地面压力均变小     

C.弹簧秤读数变大,小车对地面的压力不变

  D.弹簧秤读数不变,小车对地面的压力变大

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17.太阳光照射在平坦的大沙漠上,我们在沙漠中向前看去,发现前方某处射来亮光,好像太阳光从远处水面反射来的一样,我们认为前方有水,但走到该处仍是干燥的沙漠,这现象在夏天城市中太阳光照射沥青路面时也能观察到,对这种现象正确的解释是

 A.越靠近地面空气的折射率越大

 B.这是光的干涉形成的

 C.越靠近地面空气的折射率越小

 D.这是光的衍射形成的

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16.下列说法中不正确的是

A.将地球上所有海水的温度降低0.1℃,以放出大量的内能供人类使用

B.制造一种机器,把物体与地面摩擦所产生的热量全部收集起来,再全部加以使用

C.只要对内燃机不断进行改进,它可以把气体的内能全部转化为机械能

D.即使没有漏气,也没有摩擦的能量损失,内燃机也不可能把全部内能转化为机械能

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15.一列沿x轴正方向传播的简谐横波,t=0时刻的波形如图1中实线所示,t=0.2s时刻的波形如图中的虚线所示,则     

A.质点P的运动方向向右

B.波的周期可能为s

C.波的频率可能为1.25Hz                 

D.波的传播速度可能为20m/s

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14.下列说法正确的是  

A.是聚变

B.是裂变

C.是α衰变

D.是裂变

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在世界环保日到来前夕,联合国教科文组织就如何处理垃圾向世界中学生征文。请以Saving Our City为题,写一篇100-120词左右的短文。

提示:

1.城市垃圾的危害:污染环境,有害健康。

2.你所在城市如何处理垃圾的:

1)垃圾分类;

2)报纸、玻璃的再利用;

3)填埋有害垃圾;

4)处理废水、废气;

5)尽我所能,爱护环境,保护环境。

                                     

                                   _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

                                     

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第二节:短文改错(共10小题;每小题1分,满分10分)

Dear sir,

Thanks so much for your letter. I pleased to learn you went to Beijing for the winter

holiday at the end of last year and that you had a great fun there. I also dream of going [21世纪教育网]

there one day. Thank you also for the stamps you sent to me for my collection. Most

of them were those what I had been expecting for so a long time. You said by your

letter that you wish have some photos of me. But I’m sorry to tell you that I have little

photos good enough to send to others. Yet I will send you a photo of your family.

Please write soon and tell me what you are getting on with your college life. I am

looking forward to receive your letter.

Best wishes.

                                                 Yours,

                                                  Jason

试题详情

在世界环保日到来前夕,联合国教科文组织就如何处理垃圾向世界中学生征文。请以Saving Our City为题,写一篇100-120词左右的短文。

提示:

1.城市垃圾的危害:污染环境,有害健康。

2.你所在城市如何处理垃圾的:

1)垃圾分类;

2)报纸、玻璃的再利用;

3)填埋有害垃圾;

4)处理废水、废气;

5)尽我所能,爱护环境,保护环境。

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

温州市2009-2010学年第二学期八校返校联考

高二英语答题卷第Ⅱ卷非选择题部分

第一节:单词拼写( 共10小题;每小题0.5分,满分5分)

66. He a____________ to Mary for being late; however, her anger didn’t melt.[21世纪教育网]

67.The colleges and universities were only for men then, and women were not

p __________to attend .

68. They're busy_______________(准备)to go on holiday.

69. His   ___________  (面部的)expression suggested that he was very content.

70.G_____________ speaking , parents care more about their children's health than about their own.          

71. I don't know where the e  ____________   to the cinema is.

72. Two hundred s_____________ bicycles were returned to their owners last month with the help of the police.

73. Several new railways are under c_____________ in China.

74. She looks f_______________ to me, but I can’t remember her name.

75. I changed into my sports shoes so that I could walk more c______________.

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