热点试题

[ 数学 ] 已知x与y互为相反数,m与n互为倒数,且|a|=3,则(x+y)3﹣=(    ).

已知x与y互为相反数,m与n互为倒数,且|a|=3,则(x+y)3=(    ).

2016-05-17 | 0

[ 数学 ] 若代数式x2+3x的值为2,则代数式2x2+6x-3的值为______.

若代数式x2+3x的值为2,则代数式2x2+6x-3的值为______.

2016-05-17 | 0

[ 数学 ] 已知一个多边形的内角和是1080°,则这个多边形的边数是( )A.8B.7C.6D.5

已知一个多边形的内角和是1080°,则这个多边形的边数是(  )
A.8B.7C.6D.5

2016-05-20 | 0

[ 数学 ] 已知函数f(x)=ln(ax+b)-x,其中a>0,b>0。(1)求函数在[0,+∞)是减

已知函数f(x)=ln(ax+b)-x,其中a>0,b>0。
(1)求函数在[0,+∞)是减函数的充要条件;
(2)求函数f(x)在[0,+∞)的最大值;
(3)解不等式ln(1+)-≤ln2-1。

2016-05-23 | 0

[ 数学 ] 已知三棱柱A.B.C.D.

已知三棱柱
A.B.C.D.

2016-05-24 | 0

[ 数学 ] 己知是夹角为60°的两个单位向量,,若,则m为(   ) A.2 B.-2 C.1 D.-

己知是夹角为60°的两个单位向量,,若,则m为(   )
A.2 B.-2 C.1 D.-1

2016-05-25 | 0

[ 语文 ] 下列加粗字的读音,有误的一组是 [     ] A.吊唁(diào) 懦弱(nuò) 姗姗

下列加粗字的读音,有误的一组是[    ]
A.唁(diào) 弱(nuò) 姗来迟(shān) 不振(jué)
B.大(nuò) 黑(yǒu) 充数(yú) 来之食(ē)
C.眼(jiǎn) 息(qī) (chuí) 专横跋(hù)
D.盘(huán) (zǐ) (lài) 手可得(tuò)

2016-05-26 | 0

[ 语文 ] 下列句子中,没有语病的一项是(   )A.该厂狠抓生产质量,重视企业文化,十几年来凝聚了一

下列句子中,没有语病的一项是(   )
A.该厂狠抓生产质量,重视企业文化,十几年来凝聚了一批技术骨干,所生产的内衣产量成为全国同行业销售额率先突破十亿大关的一个著名品牌。
B.国家发改委.住城乡建设部近日联合下发《关于做好城市供水价格管理工作有关问题的通知》,《通知》要求:水价调整要统筹规划、循序渐进、分步到位。
C.作为一位杰出的哲学家和思想家,孔子一生积极求索,他奋斗的一生是“知其不可为而为之”这句格言的真实写照。
D.那个年代的手抄本很难得,书中的故事对我产生了潜移默化的影响,爱国心、人生观、事业心、爱情观以及手抄本那漂亮的字迹也让我非常喜欢。

2016-05-27 | 0

[ 英语 ] (B)Every day in China, about 200 million chil

(B)
Every day in China, about 200 million children go to school. Many of them take school buses. What should we do to keep these students safe on the road?
On April 5, the State Council (国务院) published new rules about school bus safety. These new rules are much stricter than the old ones.
Under the new rules, local governments must make sure that students attend nearby schools or boarding (寄宿的) schools to reduce traffic risks. Also, local governments must help kids in the countryside reach their school buses.
From now on, school buses have a speed limit of 80km per hour on highways and 60km per hour on normal roads. While on the road, other cars must let school buses go first.
The new rules also say that school buses must never be overloaded (超载的). They have a speed limit of 80 km per hour on highways and 60 km per hour on normal roads.
There are many other rules as well. A school bus must have more than seven seats. On each bus, there must be at least one adult to keep an eye on the kids. Each school bus must have a fire extinguisher (灭火器), a first aid box and a GPS.
Last year, a series of school bus accidents happened in China. To stop such accidents, the Central Government decided to strengthen the rules for school buses.
The most serious accident happened in November in Gansu, when a nine-seat minibus crashed. There were 62 children inside, and 21 of them died.
小题1:When did the State Council publish the new rules ?.
A.On April 5B.in NovemberC.On February 19D.On March 11
小题2:Under the new rules, which of the following is NOT true?
A.School buses must not be overloaded.
B.School buses must drive 80 km/h or less on normal roads.
C.School buses can go first when there are other cars.
D.School buses must drive 80 km/h or less on highways.
小题3:The phrase “keep an eye on” in Paragraph 6 has a similar meaning to “__________”.
A.look afterB.play withC.look forD.chat with
小题4:According to the new rule, a school bus must have the following EXCEPT __________.
A.a GPS B.more than seven seats
C.a parent of one of the studentsD.a fire extinguisher and a first aid kit
小题5:The government made new rules for school buses because __________.
A.21 students died in school bus accidents last year
B.the government encourages all students to take school buses
C.200 million children in China go to school by bus every day
D.school buses in China were not safe enough before .

2016-05-28 | 0

[ 英语 ] 书面表达         假如你是韩梅,收到了美国笔友Jack的来信,得知他在吸烟,请你给

书面表达
        假如你是韩梅,收到了美国笔友Jack的来信,得知他在吸烟,请你给他回一封信,告诉他吸烟的危害并劝他戒烟。
       要求:1. 语句通顺、语法正确;
                   2. 70词左右。
                                                                                                                                                                
                                                                                                                                                                

2016-05-28 | 0