在图所示的四种现象中,属于光的折射现象的是

题型:选择题

问题:

在图所示的四种现象中,属于光的折射现象的是

考点:光的折射现象
题型:选择题
阅读下面的短文,把A-E五个句子填入文中空缺处,使短文内容完整正确。
                                                   Should mobile phones be allowed at school?
     __1__ Some mobile phones are more than just phones -they are being used as radios, cameras and
 MP4 players, and they are also used to send e-mails or surf the Internet. __2__     
     People have different ideas about whether students should use mobile phones at school or not.
     __3__ If their parents have something important to tell them, they can call their teachers for help. If
 someone's mobile phone rings during a Chinese class, he and his classmates can't concentrate on what the
  teacher is saying. Some parents also point out that their children often use their mobile phones to
 download (下载) unhealthy information from the Internet. __4__ 
     Other people believe that we can find some ways to use mobile phones to help students learn better in
  the classroom, since many of today's mobile phones are like mini computers. And children usually know
  more than adults about how to use new technology (技术). __5__      
     What are your answers to the question?
A. They are really worried about this.
B. Some of them can even be used as mini computers.
C. More and more students are using mobile phones a school now.
D. Why not use mobile phones in the classroom?
E. Some people think that students don't really need mobile phones.
题型:选择题

利润表中的营业税金及附加项目应根据日常经营活动中发生的营业税、消费税、增值税等金额汇总填列。()

题型:选择题

治疗首选

A.抗生素治疗

B.病理活检

C.手术切除

D.放疗照射

E.不需处理

题型:选择题

下列关于自然资源说法正确的是(  )

A.土地是万物之本

B.为了卫生,尽量多使用一次性木筷

C.荒漠不属于土地资源

D.水资源是可再生资源,是“取之不尽,用之不竭”的,没有必要节约用水

题型:选择题

就给定资料所反映的主要问题,用1 200字左右的篇幅,自拟标题进行论述。要求中心明确,内容充实,论述深刻,有说服力。

更多题库