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如果关于x的一元二次方程 有两个不相等的实数根,则m的取值范围是.
平定大小和卓叛乱后,清朝政府在新疆地区(     )

A . 赐封达赖喇嘛 B . 赐封班禅额尔德尼 C . 设置驻藏大臣 D . 设置伊犁将军
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Three Things to Do Before You Are 18

    Are you bored with your daily life? Here are some things you should try before you are 18, because after that it's too late.

Learn to swim

    Learning to swim is so important that it can save your life. If you can't swim well, you won't be able to do water sports like water skiing, surfing and diving. Even taking a boat trip will be dangerous for you. Make sure you do it.

Try at least one kind of team sports

    Being a good team player is important in life. You can't just think of yourself, but have to work well with other people. Team sports like basketball, football and baseball can keep you fit and healthy, and they are also great fun. Teams usually have "a good social life" too, you'll go to lots of parties and make many friends.

Collect something

    One of the best things for under-18s is collecting. You could collect many kinds of stamps, or you could collect things that make you remember what you did, like cinema tickets for films or fans from friends. The best way to collect is to have special boxes to put your collections in and to write what each thing means to you.

  1. (1) The most important reason for learning to swim is that ______.
    A . it can save your life B . it can make you healthy C . you might easily do lots of things D . you might feel well
  2. (2) "A good social life" in the passage means ______.
    A . you'll study in groups B . you'll work in the society C . you'll join in many matches D . you'll make lots of friends in parties
  3. (3) What kind of collection is NOT mentioned in the passage?
    A . stamps. B . cinema tickets. C . boxes. D . fans
——Do you think our basketball team will win the match?

   ——Yes,we have better players.So I      them to win.

A . hope   B . help  C . expect
补充词语。

   风    出人     

强    群    新    标

如图,在直角三角形ABC中,∠ACB=90°,CD是AB边上的高,AB=10cm,BC=8cm,AC=6cm,求:

  1. (1) CD的长;
  2. (2) △ABC的角平分线AE交CD于点F,交BC于E点,求证:∠CFE=∠CEF.
世界上使用人数最多和分布最广的语言分别是(       )                

A . 英语、汉语 B . 汉语、法语 C . 汉语、英语 D . 法语、日语
在“19□789≈19万”中,□里最大可填(   )。
A . 5 B . 4 C . 9 D . 6
将下列疾病与其对应的病因对上号

如图表示青少年部分活动对能量需求的相对值(与静卧时相比),以下说法合理的是(    )

A . 睡觉时,脉搏变快,组织细胞对氧气的需求量增加 B . 静坐时,甲状腺激素水平降低,神经兴奋性增强 C . 慢走时,呼吸加快,肺静脉血液中氧气含量增加 D . 跑步时,汗腺周围的毛细血管收缩,排汗增多
由于动物的生活环境日趋恶化,动物界决定开展一场有纪念意义的运动会,特邀人类去观看,以唤起人们对动物生存环境的关注。蚯蚓、狼、鹦鹉、蜜蜂、鲫鱼等动物都积极参加了活动。
  1. (1) 这些动物中具有社群行为的有,你判断的依据是
  2. (2) 狼的运动系统包括,为什么狼的运动速度比蚯蚓的快?
下列灭火方法中,利用“移走可燃物”这一原理的是(   )
A . 用灯帽盖灭燃着的酒精灯 B . 用水浇灭着火的纸箱 C . 用锅盖盖灭着火的油锅 D . 将大火蔓延路线前的一片数木砍掉
草地上有12只绵羊和8只山羊,山羊比绵羊少几只?
I could ____control my feelings at the moment. The movie reminds me of my childhood.
A . really B . nearly C . slowly D . hardly
依次填入下面一段文字横线处的语句,衔接最恰当的一项是(     )
林冲想起离了这半里路上有个古庙,可以安身,_______________________________林冲把枪和酒葫芦放在纸堆上……却把葫芦冷酒提来,慢慢地吃,就将怀中牛肉下酒。
①入得里面看时,殿上塑着一尊金甲山神,两边一个判官,一个小鬼,侧边堆着一堆纸。
②旁边止有一块大石头,掇将过来靠了门。
③入得庙门,再把门掩上。
④团团看来,又没邻舍,又无庙主。
⑤把被卷了,花枪挑着酒葫芦,依旧把门拽上,锁了,望那庙里来。

A . ⑤③④①② B . ④⑤③①② C . ④⑤③②① D . ⑤③②①④
Father's Day is in            .
A . February B . March C . June
图中甲、乙两个同学穿着滑冰鞋面对面静止站在冰面上,如果甲用力推一下乙,其结果是(    )

_x0000_i1028

A . 甲仍然静止,乙被推开 B . 乙受到甲的推力作用,甲不受乙的推力作用 C . 乙受到的推力大于甲受到的推力 D . 甲、乙同时相对离开
如图,在边长均为1个单位的正方形网格图中,建立了直角坐标系xOy,按要求解答下列问题:

  1. (1) 写出△ABC三个顶点的坐标;
  2. (2) 画出△ABC向右平移6个单位后的图形△A1B1C1
  3. (3) 求△ABC的面积.
下图反映了1948年以来世界贸易组织成员国数量变化的趋势。从中我们可以得出的结论是(   )

A . 发达国家在世贸组织中数量越来越多 B . 发达国家掌握了世界经济主导权 C . 中国重返联合国导致了发展中国家数量的增加 D . 这种趋势反映了世界经济全球化的要求   
用弹簧测力计竖直挂一物体,当物体浸入水中五分之一体积时,弹簧测力计示数为4N;当物体浸入水中一半体积时,弹簧测力计示数为1N。取下该物体放入水中,物体静止时受到的浮力是(    )

A . 5N B . 6N C . 14N D . 12N
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