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Tom doesn't like play the piano.

在等比数列 是函数 的极值点,则 =(    )
A . B . C . D . 或无意义
已知点C是线段AB的黄金分割点,且AC>BC,如果AB长为20,则AC为(    )
A . 10 ﹣10 B . 10﹣10 C . 30﹣10 D . 20﹣10
(be) your parents usually free in the evening?

—Yes. But they(be not) free yesterday evening. They helped me with my lessons.

如图所示,物体A、B质量分别是4kg和10kg,不计滑轮与绳间摩擦及绳的重力,若整个系统静止,g取10N/kg.求:

  1. (1) 地面对B的摩擦力的大小;

  2. (2) B对地面压力的大小.

夏季,我国南北气温差别很大(    )(判断对错)

阅读短文,回答问题

Everyone meets difficulties in their life. Daniel Kish was born with a special eye illness and lost his eyesight(视力) before he was only 14 months old.

Soon after, however, he started to do an amazing thing. He learned to make clicks(咔哒声) with his tongue(舌头) to help him move around. Kish now moves around using sonar(声呐). He is so good at it that he can ride a bicycle by himself on public roads. And he started the organization(组织) World Access(通道) for the Blind(WAFTB) in 2000, teaching others how to use sonar. In the interview with National Geographic, he explains how the sonar works.

"When I make a click sound, it produces sound waves(声波). These waves reflect(反射) off surfaces(表面) all around and return to my ears. My brain then deals with(处理) the sound and turns it into pictures in my mind. Each click is like a camera flash, which helps me make a 3-D picture of the things around me. It's like having a conversation with the environment."

Kish feels it is exciting to ride a bike using a sonar. "It may sound a bit dangerous to move around the world in this way," he says. "But most people in the world live in fear(害怕) of things that they imagine. I love hiking and mountain-biking. I go almost everywhere. And I've never had an accident and hurt myself."

He is happy to be able to help more blind(瞎的) children to improve their life. "We've helped over 10,000 students in nearly 40 countries," he tells the reporter.

  1. (1) Kish lost his eyesight when he was _________________.
    A . born B . fourteen years old C . fifteen months old D . fourteen months old
  2. (2) Kish moves around using sonar because ________________.
    A . it makes him "see" the world B . he is good at making clicks C . he has a great interest in science D . it is important for him to keep healthy
  3. (3) Which of the following is the right order showing the sonar works?

    ①The sound waves reflect off surfaces.

    ②The person makes a clicking sound.

    ③The brain turns the sound into pictures.

    ④The sound waves reach the person's ears.

    A . ①④③② B . ②①④③ C . ①④②③ D . ②③①④
  4. (4) What can we learn about World Access for the Blind( WAFTB ) from the passage?
    A . It offers the blind free bicycles. B . It sells sonar products to the blind. C . It helps the blind find more friends. D . It teaches the blind to use sonar.
  5. (5) The passage is probably taken from _______________.
    A . a dictionary B . a guide book C . a magazine D . a picture book
如图,一次函数 的图象与 轴、 轴交于 两点,与反比例函数 的图象相交于 两点,分别过 两点作 轴, 轴的垂线,垂足为 ,连接 ,有下列结论:① 的面积相等;② ;③ ;④ 其中正确的个数有(   )

图片_x0020_100006

A . 2 B . 3 C . 4 D . 5
下列各句中划线成语的使用,全都不正确的一项是(    )

①鲁迅《记念刘和珍君》一文,笔锋犀利,力透纸背。鲁迅用文字去揭露统治者的丑恶面目,鞭挞统治者的罪恶行径。

②西樵山上的南海观音寺,规模浩大,香火鼎盛,慕名前来参拜的僧侣信徒很多,每逢法会更是香客如云,不绝如缕

③周末不妨与大自然展开一次心灵对话,到佛山美轮美奂的绿岛湖畔欣赏碧波荡漾,感受佛山城市升级带来的新变化。

④韩国以允许美国在其领土部署雷达监控范围可覆盖东北亚的萨德系统来防范朝鲜的核威慑,这无异于火中取栗

⑤中国西昌卫星发射中心以“一箭双星”成功发射北斗三号组网卫星,北斗卫星导航系统实现全球覆盖可计日程功

⑥台风“天鸽”带来的强降雨,导致广东部分地区城市内涝。灾情严重,扣人心弦 , 相关部门正紧急行动组织救灾。

A . ①③④ B . ①④⑤ C . ②③⑥ D . ②⑤⑥
不能用金属和酸直接反应得到的物质是(   )

A . FeCl3 B . FeCl2 C . ZnCl2 D . MgCl2
阅读下列材料:

材料一 (英国)1832~1868年间,共更换了10届内阁,其中2届发生在大选之后,8届因平时下院投票选成。——《英国政治制度史》

材料二 在选任政府方面,不管我们的宪法在理论上授予女王多么大的自由,在实践中这种自由是不存在的。

材料三 拥有下院多数事事可行,没有下院多数一事无成。

请回答:

  1. (1) 材料一反映了什么现象?
  2. (2) 材料二、三集中说明了内阁的组建取决于什么?
  3. (3) 上述材料反映了英国逐渐确立了怎样的政治制度?
桃   树

    一株桃树,长在一棵胡桃树旁边,它满怀嫉恨地望着枝丫结满了累累果实的胡桃树。

     “为什么那棵树就长这么多果实,而我长这么少呢?”它想到,“这是不公平的,我一定要想办法也长得那么多。”

     “千万别这样想呀!”一株李树看透了桃树的心思,劝告道,“你难道没有看到胡桃树的树干长的有多粗大吗?你没有看到它的枝丫多强壮吗?我们每个人都要量力而为,想法子长出好果子!要重质不要重量。”

    可是桃树已经嫉恨得糊涂了,压根儿不愿听。它要求它的树枝从大地吸收更多的养料,要它的细枝输送更多的树汁。于是它展开了更多的花朵,花朵都结了果实。由头到脚全结满了桃子。

    可是当桃子成熟时,它们的重量就增加了,以至于枝丫都负担不起它们,而且树干也撑不住那些果实的重量。桃树呻吟一声,弯了,接着“咔嚓”一声巨响,树干断了,整株树倒了下来。桃子全烂在了胡桃树的脚下。

这则寓言告诉了我们什么道理?


It was not immediately obvious that water was __________to the development of life.
A . fundamental B . regular C . unnecessary D . beneficial
关于澳门经济的叙述,正确的是(  )

A . 澳门早期工业比较发达 B . 加工工业是其经济支柱 C . 博彩旅游业是其经济支柱 D . 对外贸易发达,是重要的转口港
阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或者使用括号中词语的正确形式填空。

    My brother and I like sports very much. We like (run), playing basketball, swimming and so on. Of all the (sport), we like swimming (good). Swimming is really . (interest). (连词) you swim in the pool, you look like a (love) fish. Very cool. You will be happy if you can (swim). If you often swim, you will be (health). (swim) can bring you a lot of fun. Come and swimming (介词) us in the following two clubs.

周长相等的正方形,它们的边长也相等。(    )
黑格尔说:“平凡的土地、平凡的平原流域把人类束缚在土壤上,把他卷入无穷的依赖性里边,但是大海却挟着人类超越了那些思想和行动的有限的圈子。”这句话意在说明(    )
A . 地理差异使文明具有多元性 B . 海洋对人类文明影响更大 C . 社会历史环境影响文明发展 D . 沿海比内陆居住环境优越
某植物体可以完成下列反应(其中◇.○代表不同的单糖),其中◇-○代表的二糖可能是(  )

A . 麦芽糖 B . 乳糖 C . 蔗糖 D . B和C
天文学家已经在200光年外新发现15颗围绕一颗小型红矮星(尺寸相对较小、温度相对较低的恒星)运转的行星。在这些新发现的行星中,一颗可能宜居的“超级地球”存在液态海洋。编号为“K2-155d”的这颗行星大小是地球1.6倍,位于其宿主恒星的宜居带内。

完成下题。

“超级地球”位于(   )

A .     地月系 B . 太阳系 C . 银河系 D . 河外星系
人类遗传病发病率逐年增高,相关遗传学研究备受关注。据下图A和图B分析,下列表述正确的是(   )


A . 图A中发病率的调查和图B中遗传方式的调查,都应该在人群中随机取样调查 B . 图B中7号个体完全不携带这两种致病基因的概率是2/3 C . 图示中有关遗传病均不能利用普通光学显微镜进行产前诊断 D . 多基因遗传病的显著特点之一是成年人发病风险显著增加
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