热点试题

[ 化学 ] 用括号中的试剂除去下列气体物质中所含杂质,所用药品正确的是 [     ] A.CO2中混

用括号中的试剂除去下列气体物质中所含杂质,所用药品正确的是
[     ]
A.CO2中混有HCl(饱和Na2CO3溶液)
B.Cl2中混有HCl (AgNO3溶液)
C.H2S中混有H2O蒸气(浓硫酸)
D.NO中混有NO2 (水)

2016-05-17 | 0

[ 数学 ] 某次足球比赛的计分规则是:胜一场得3分,平一场得1分,负一场得0分,某球队参赛15场,负2

某次足球比赛的计分规则是:胜一场得3分,平一场得1分,负一场得0分,某球队参赛15场,负2场,若该队预计积33分才能出线,则该队至少要胜几场[    ]
A.8
B.9
C.10
D.11

2016-05-18 | 0

[ 数学 ] 如图,点P是反比例函数图像上的一点,则矩形PEOF的面积是(    )。

如图,点P是反比例函数图像上的一点,则矩形PEOF的面积是(    )。

2016-05-18 | 0

[ 数学 ] 两圆的直径是方程x2-7x+12=0的两个根,当两圆的圆心距为7时,两圆的位置关系是( )

两圆的直径是方程x2-7x+12=0的两个根,当两圆的圆心距为7时,两圆的位置关系是(  )
A.相交 B.外切 C.内切 D.外离

2016-05-18 | 0

[ 数学 ] 如图,点E在AC的延长线上,下列条件中能判断AB∥CD的是( )A.∠3=∠4B.∠D=∠

如图,点E在AC的延长线上,下列条件中能判断ABCD的是(  )
A.∠3=∠4B.∠D=∠DCE
C.∠1=∠2D.∠D+∠ACD=180°

2016-05-19 | 0

[ 数学 ] 下面方块中有25个汉字,如果用C3表示“天”,那么按下列要求排列,会组成什么话?请你把它写

下面方块中有25个汉字,如果用C3表示“天”,那么按下列要求排列,会组成什么话?请你把它写下来.

2016-05-20 | 0

[ 数学 ] 已知方程x2+y2-2(m+3)x+2(1-4m2)y+16m4+9=0表示一个圆.(1)

已知方程x2+y2-2(m+3)x+2(1-4m2)y+16m4+9=0表示一个圆.
(1)求实数m的取值范围;
(2)求该圆半径r的取值范围;
(3)求圆心的轨迹方程.

2016-05-25 | 0

[ 数学 ] 圆被极轴及直线所截取的面积为

被极轴及直线所截取的面积为      

2016-05-26 | 0

[ 英语 ] I didn’t know which shirt was better, the bla

I didn’t know which shirt was better, the black one or the red one, so I took  them     .
A.allB.eachC.noneD.both

2016-05-27 | 0

[ 英语 ] 用方框内所给词的正确形式填空。(每词只用一次)you    grow    take   

用方框内所给词的正确形式填空。(每词只用一次)
you    grow    take     how    stay
 
Jamie was a boy. He didn’t have a hobby. After school, he didn’t 1  ___ part in any games with his friends. He just 2  ____ at home and watched a lot of television. No hobby was not a good way for a young boy to 3___   up. So one day his grandpa knew it and came to his home. He taught him 4_________to fish. Jamie was very happy and had a lot of fun doing this. From the story we know hobby is a great joy.
Boys and girls, the winter holiday is coming. By the way, what plans have you made for it? What’re your hobbies? Let’s do the things we like to do. Come on, boys and girls. I’m very sure you’ll enjoy 5________  . But remember to bring your school works to your teacher before you come to school.

2016-05-28 | 0