热点试题

[ 数学 ] (7分) 已知a=3,b=—2,化简并求的值

(7分) 已知a=3,b=—2,化简并求的值

2016-05-18 | 0

[ 数学 ] 如图,反比例函数y=kx的图象与一次函数y=-x+1的图象在第二象限内的交点坐标(-1,n

如图,反比例函数y=
k
x
的图象与一次函数y=-x+1的图象在第二象限内的交点坐标(-1,n),则k的值是______.

2016-05-18 | 0

[ 数学 ] 已知,则=(     )

已知,则=(     )

2016-05-18 | 0

[ 数学 ] 如图,由“基本图案”正方形ABCO绕O点顺时针旋转90°后的图形是( )A.B.C.D.

如图,由“基本图案”正方形ABCO绕O点顺时针旋转90°后的图形是(  )
A.

B.

C.

D.

2016-05-20 | 0

[ 数学 ] 17.52精确到十分位约是17.5。 [     ]

17.52精确到十分位约是17.5。[    ]

2016-05-21 | 0

[ 数学 ] 大人上楼比小孩快一倍,小孩从一楼到四楼要3分钟,3分钟大人上到了几楼?

大人上楼比小孩快一倍,小孩从一楼到四楼要3分钟,3分钟大人上到了几楼?

2016-05-21 | 0

[ 数学 ] 任选几块七巧板拼成一个长方形和一个三角形。

任选几块七巧板拼成一个长方形和一个三角形。

2016-05-21 | 0

[ 数学 ] 已知双曲线的中心在原点,焦点F1,F2在坐标轴上,离心率为,且过点(4,-)。点M(3,m

已知双曲线的中心在原点,焦点F1,F2在坐标轴上,离心率为,且过点(4,-)。点M(3,m)在双曲线上。
(1)求双曲线方程;
(2)求证:=0;
(3)求△F1MF2面积。

2016-05-25 | 0

[ 语文 ] 阅读新天地。 高大的皂荚树(节选) 春天,下小雨啦。皂荚树为我们遮挡着,雨滴就不会很快掉下

阅读新天地。
高大的皂荚树(节选)
  春天,下小雨啦。皂荚树为我们遮挡着,雨滴就不会很快掉下来。我们就能够像平常一样,在操场上做体操,做游戏。
  夏天,暴烈的太阳当头照。有了皂荚树的遮挡,烈日就只能投下星星点点的光斑。我们活动在操场上,觉得格外凉爽。
  秋天,皂荚树上许许多多的皂荚儿成熟了,那样子,就像常见的大扁豆。高年级的同学爬上树去,用带钩子的小竹竿把皂荚儿钩下来。小同学呢,把它们捡到筐子里,交给老师。
  每天,老师用皂荚熬了水,盛在脸盆里。上完课,我们的手上沾了些墨水,用皂荚水一洗,就又白白净净了。劳动过后,我们的手上、胳膊上满是土,满是泥,用皂荚水一洗,就又清清爽爽了。
  冬天,皂荚树落叶了。枯黄的小叶子,打着旋儿,不断地飘落,在地上铺了一层又一层。这时候,我们就把树叶扫到一起,堆放在墙脚下。
1.根据拼音写出相应的字。
 zhē        áo         shuǎng      bào
(  )挡    (  )了水    凉(  )    (  )烈
2.在文中找出恰当的词语,填在下面的括号里。
(  )的太阳  (  )的光斑  (  )的叶子  (  )的竹竿
3.这段文章是按________________顺序写的。
4.按要求改写句子。
(1)皂荚树上许许多多的皂荚儿成熟了。(缩写)
_________________________________________________
(2)皂荚树落叶了。(扩写)
_________________________________________________
5.皂荚树给你带来了哪些启示?
_________________________________________________

2016-05-26 | 0

[ 英语 ] 阅读理解。      Jane always goes to school early.

阅读理解。
     Jane always goes to school early. She likes to talk to her friends before class. After school she does not
go home early. She is always late. Jane stops to see the animals in the pet shop. She likes to see the dogs.
One of them is a little dog. She watches the little white dog play in the window of the shop. She watches for
a long time, so she comes home late.
     One day her father and mother ask why she is late, and she tells them about the little dog in the pet shop.
     Jane is not late the next day. She stops to look in the window of the shop. But she doesn't see the little
white dog, and she is very sad. She is also very happy, today is her birthday.
     Mother shows her a big birthday cake and Father gives her a birthday surprise. He gives the little white
dog from the shop. Jane is very happy. The next day Jane does not come home late. She runs home to play
with the white dog.
1. Before class begins, Jane usually ________.
A. plays with her friends
B. talks to her friends
C. looks at the dogs in the window
D. have a break
2. After school Jane ________.
A. comes home early
B. does not go home late
C. plays with the dogs
D. always goes home late
3. Jane likes ________ best.
A. the pet shop
B. the little white dog
C. little animals
D. the window of the shop
4. Who bought (买) the little white dog?
A. Jane.
B. Jane's friends.
C. Jane' s father.
D. Nobody.
5. The birthday surprise is ________.
A. a big cake
B. some presents
C. some flowers
D. the little white dog

2016-05-28 | 0