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如果一个人的食物有1/2来自绿色植物,1/4来自小型肉食性动物,1/4来自羊肉。假如能量传递效率为10%,那么该人每增加1千克体重,约消耗植物(   )
A . 10千克 B . 28千克 C . 100千克 D . 280千克
根据对话内容及所给首字母提示,补全所缺单词。

A: Nice to meet you, Mr. Hand.

B: Nice to meet you, t.

A: You look young, Mr. Hand. 

B: Thank you! I think that's b I have a healthy life.

A: Well, I think so. What healthy h do you have?

B: I get up early and go to bed early. I often play sports and eat healthy f.

A: Great! Do you smoke (吸烟)?

B: No, I n smoke. It's unhealthy.

A: That's right. 

近代时期,在清政府被迫签订的不平等条约中,首次出现允许外国人在中国通商口岸开设工厂条款的是(     )
A . 中美《望厦条约》 B . 中英《北京条约》 C . 中日《马关条约》 D . 《辛丑条约》
由一个电源、两个小灯泡、一个电键和几根导线连接成一个电路.当断开电键时,两个灯泡都不发光;闭合电键,两个灯泡都发光,则下面说法中正确的是()

A . 两灯泡一定是串联连接 B . 两灯泡一定是并联连接 C . 以上两种情况都有可能 D . 以上都不对
G20杭州峰会向世界展示了中国风采,文艺晚会以江南韵味惊艳世界,呈现了中国文化,更彰显了中国的文化自信。这是因为中华文化(    )

①博大精深、源远流长               ②是世界上最优秀的文化

③是中华民族的“根”                    ④推动了世界文化的发展

A . ①②③ B . ①②④ C . ②③④ D . ①③④
查阅某地区的等高线地形图,发现一局部如下图所示,等高距为50米,则a等高线代表的数值是(    )

A . 200 B . 150 C . 300 D . 250
画图表示下面算式的意思。

2+3=5

— What do you think of the news?

—The news ________ terrible. But we are ________ in it.

A . sound, interested B . sounds, interesting C . sounds, interested D . is sounding, interested
2008年我区部分居民用上了燃气公司提供的天然气,代替原来使用的煤或液化石油气,对我市的环境起了一定的改善作用。回答下列问题:
  1. (1) 天然气的主要成分是甲烷(CH4),写出甲烷燃烧的化学方程式为
  2. (2) 某小区原来使用的管道燃气是液化石油气(主要成分C3H8),煤气公司给小区的炉灶进行了改装,如果改装进空气口,应将进口直径(变大或变小)。
  3. (3) 列举一条天然气取代煤作为燃料的优点:
  4. (4) 合格公民都应具有节能意识,请你提出一条具体的节能建议
  5. (5) 按要求完成以下化学方程式:

    肼(N2H4)和一氧化氮(NO)燃烧反应产生的能量可以作为火箭发射的动力,反应后生成两种物质,其中一种是空气中含量最多的气体,另一种是植物光合作用的原料之一。则反应的化学方程式为

如图所示,甲图是x-t图像,乙图是v-t图像,图中给出的四条曲线1、2、3、4,分别代表四个不同物体的运动情况,关于它们的物理意义,下列描述正确的是(   )

A . 两图像中,t2、t4时刻分别表示物体2、物体4已经向负方向运动 B . 两图像中,物体1和物体2在t1时刻相遇,物体3和物体4在t3时刻相遇 C . x-t图像中0至t1时间内物体1和物体2的平均速度相等 D . v-t图像中0至t3时间内物体3和物体4的平均速度相等
鸡的性别决定方式属于ZW型,现有一只纯种雌性芦花鸡与一只纯种雄性非芦花鸡交配多次,F1中雄性均为芦花性状,雌性均为非芦花性状。据此推测错误的是(    )
A . 控制芦花和非芦花性状的基因在Z染色体上,而不可能在W染色体上 B . 雄鸡中芦花鸡的比例比雌鸡中的相应比例大 C . 让F1中的雌雄鸡自由交配,产生的F2中表现型雄鸡有一种,雌鸡有两种 D . 将F2中的芦花鸡雌雄交配,产生的F3中芦花鸡占3/4
If you try your best, you can find the secret (easy).
小明在“测平均速度的实验”中,设计了如图所示的实验装置:

图片_x0020_1564486001

  1. (1) 用测量小车运动的路程,用测量运动小车通过这段路程所用的时间,这个实验所依据的原理是
  2. (2) 实验中为了方便计时,应使斜面的坡度较(填“大”或“小”)。
  3. (3) 若图中停表的每格为1s,那么实验中小车通过前半段路程的平均速度为m/s,小车通过全程的平均速度为m/s。
  4. (4) 小车沿斜面下滑的过程中,速度的变化情况是
在下列物质中,能够导电的电解质是(   )
A . 食盐晶体 B . 无水乙醇 C . 熔融的氯化钾 D . 稀硫酸溶液
Show me _________________ markers.
A . three brown B . brown three C . three and
CPU(中央处理器)是手机最核心的零部件,美国高通公司的骁龙处理器占据我国手机44%左右的市场份额。据此完成下面小题。
  1. (1) 高通骁龙处理器市场份额占比大的最主要原因是(   )
    A . 技术水平高 B . 市场需求大 C . 价格低廉 D . 通用性好
  2. (2) 为减轻我国智能手机CPU对高通公司的依赖,应该(   )
    A . 多向其它国家购买 B . 加强自主研发 C . 手机CPU完全国产 D . 自创技术标准
阅读理解

    Zach Bonner, a teenage boy, has just walked a long journey, more than 1, 200 miles from his home town in Tampa, Florida, to the nations capital, Washington, DC, with the aim to raise awareness and funds for homeless kids.

    In the final leg of the trip, Zach has traveled about 10 miles every day. Along the way, he has collected more than1.000 letters about homeless children. He hopes to give the letters to the President. Zach says he hopes his journey can make a difference.

    More than one million children in the United States live in shelters or on the streets. In order to know the difficulties that homeless children face, Zach spent 24 hours with a group of them every day during his long journey.

    On June 3. Zach walked the last mile of his long journey. More than 500 supporters, including 300 homeless kids joined Zach. "It was a long walk," Zach said, "but it was well worth it."

    Zach's idea came from a movie about Mildred Norman, who tried to promote world peace by walking 25,000 miles. Zach considered walking as a good way to draw public attention to his cause.

    Zach is also the founder of the Little Red Wagon Foundation, whose purpose is to help needy young people. Through the foundation, Zach has raised money and donated school supplies. "A lot of homeless youth don't get the chance to succeed in school because they don't have supplies."

    Zach's volunteerism has even inspired a Hollywood movie based on his life. "He is the most extraordinary kid I've ever met "says Michael Guillen, who has made the movie." He hasn't just talked the talk. He has walked the walk."

    Difficult and tiring as the journey was, Zach was never discouraged in his walking. "When homeless kids get tired of being homeless, they don't give up. So why should I quit when I get tired of walking?"

  1. (1) Why did Zach Bonner start his long journey?
    A . To know the difficulties that homeless kids face. B . To raise awareness and funds for homeless kids. C . To collect letters from homeless kids for the President. D . To promote world peace after Mildred Norman.
  2. (2) Which of the following statements is true about Zach Bonner?
    A . He was greatly influenced by Mildred Norman. B . He made a lot of money through his foundation. C . Hundreds of supporters walked with him throughout the journey. D . He wanted to promote world peace by walking.
  3. (3) It can be inferred from the passage that______.
    A . the President doesn't care for homeless kids at all B . Zach became an actor in a Hollywood movie C . Zach is a kind and strong-minded kid D . more and more American children suffered from losing their homes
  4. (4) What is the best title for the passage?
    A . A Walk for Others. B . A Boy Winning World Fame. C . A Foundation Helping Others. D . Homeless Children Project in the US.
带有病原微生物的飞沫核(直径大于0.000007米),在空气中短距离(1米内)移动到易感人群的口、鼻黏膜或眼结膜等导致的传播称为飞沫传播,其中0.000007用科学记数法可表示为 .
绿色植物直接或间接是其它生物的食物.(判断对错)
下列重要的经纬线穿过我国的是:

A . 北回归线 B . 本初子午线 C . 北极圈 D . 赤道
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