热点试题

[ 化学 ] 下列化学用语表达不正确的是( )A.乙酸的实验式:CH2OB.S2-的结构示意图:C.NH

下列化学用语表达不正确的是(  )
A.乙酸的实验式:CH2OB.S2-的结构示意图:

C.NH3的结构式:

D.HCl的电子式:

2016-05-16 | 0

[ 数学 ] 用棋子摆出下列一组图形: ①填写下表: ②照这样的方式摆下去,写出摆第n个图形棋子的枚数;

用棋子摆出下列一组图形:
①填写下表:
②照这样的方式摆下去,写出摆第n个图形棋子的枚数;
③如果某一图形共有99枚棋子,你知道它是第几个图形吗?

2016-05-18 | 0

[ 数学 ] 正方体的棱长扩大到原来的3倍,它的体积扩大______倍.

正方体的棱长扩大到原来的3倍,它的体积扩大______倍.

2016-05-21 | 0

[ 数学 ] 数列,则数列中最大项的值为______________。

数列,则数列中最大项的值为______________。

2016-05-23 | 0

[ 数学 ] 在平面直角坐标系中,已知△ABC的两个顶点B(-3,0),C(3,0)且三边AC、BC、A

在平面直角坐标系中,已知△ABC的两个顶点B(-3,0),C(3,0)且三边AC、BC、AB的长成等差数列,求点A的轨迹方程.

2016-05-25 | 0

[ 语文 ] 阅读《望岳》完成下列问题。 望岳杜甫   岱宗夫如何?齐鲁青未了。   造化钟神秀,阴阳割

阅读《望岳》完成下列问题。
望岳
杜甫
   岱宗夫如何?齐鲁青未了。
   造化钟神秀,阴阳割昏晓。
   荡胸生曾云,决眦入归鸟。
  会当凌绝顶,一览众山小。
1、表明诗人并未登上泰山之顶的依据有两个,一是标题中的____,二是诗句中的____。
2、这首诗中颔联描写近望泰山所见景物,其中“割”“钟”两字,历来被人称道。请你选择其中一字分析好在何处?
____________________________________________________________________________

2016-05-27 | 0

[ 语文 ] 阅读下面一首清诗,然后回答问题。 江上阻风 宋琬睡起无聊倚舵楼,瞿塘西望路悠悠。长江巨浪征

阅读下面一首清诗,然后回答问题。
江上阻风
宋琬
睡起无聊倚舵楼,瞿塘西望路悠悠。
长江巨浪征人泪,一夜西风共白头。
  【注】宋琬在顺康年间,因被人诬告曾两次下狱,释放后长期赋闲。康熙十一年,年近花甲的宋琬又被起任四川按察使,这首诗就是赴任途中所作。
(1)请简要分析“瞿塘西望路悠悠”一句所蕴含的深层含义。
答:_____________________________________________________
(2)诗的最后两句有何奇妙之处?抒发了诗人什么样的思想感情?
答:_____________________________________________________

2016-05-27 | 0

[ 英语 ] E—schoolbags Is your schoolbag too heavy to c

E—schoolbags
Is your schoolbag too heavy to carry? The e-schoolbag will help you. It is said that e-schoolbags are going to be brought into use in Chinese middle schools soon.
Heavy schoolbags have been a serious problem for a long time. But the e-schoolbag will work it out. An e-schoolbag is much lighter than a usual schoolbag. Perhaps, the e-schoolbag should be called an e-textbook. It is as small as a usual book, but it can still have all the things for study, such as a textbook, an exercise book and so on. They can be made into chips(芯片) like stamps. The students can read the text page by page on the screen, take notes, or even send e-mails to their teachers. They only need to put the right chip into the e-schoolbag and then the students can use it.
Some people say that e-textbooks can be easily broken, while others say it is not good to student’s eyes. But only time will tell.
小题1:What is the e-schoolbag used for ? It can’t help students _________.
A.take notes
B.send e-mails
C.lighten(减轻) the schoolbag
D.read the text in the paper book
小题2:What’s the e-school like?
A.It’s bigger than a usual book.
B.It’s just as big as a usual book.
C.It’s as big as a stamp.
D.It’s not as small as a usual book.
小题3:How can e-schoolbags have all the things for study?
A.They are made into stamps
B.They are made into chips.
C.They are called e-textbooks
D.They put the books into e-schoolbags.
小题4:Which statement is NOT true according to the passage?
A.That e-schoolbags may be easily broken
B.It may not be good to student’s eyes.
C.They have been into use in school in China.
D.The e-schoolbag will solve the problem of the heavy schoolbags.

2016-05-28 | 0

[ 物理 ] 2011年10月7日-16日在日本东京举行的第43届世界体操锦标赛上,我国选手陈一冰勇夺吊

2011年10月7日-16日在日本东京举行的第43届世界体操锦标赛上,我国选手陈一冰勇夺吊环冠军,成就世锦赛四冠王.比赛中他先双手撑住吊环,然后身体下移,双臂缓慢张开到图示位置,此时连接吊环的绳索与竖直方向的夹角为θ.已知他的体重为G,吊环和绳索的重力不计.则每条绳索的张力为(  )
A.
G
2cosθ
B.
G
2sinθ
C.
G
2
cosθ
D.
G
2
sinθ

2016-05-29 | 0

[ 物理 ] 磁场中静止的小磁针指向都正确的图是(   ) A. B. C. D.

磁场中静止的小磁针指向都正确的图是(   )
A.

B.

C.

D.

2016-05-29 | 0