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下列实验方法能达到实验目的的是（）

选项	实验目的	实验方法
A	鉴别氮气和二氧化碳	将燃着的木条分别伸入集气瓶中，使木条熄灭的是二氧化碳
B	观察木炭燃烧现象	将木炭伸入盛有氧气的集气瓶中
C	区分过化氢溶液和水	分别向试管中加入二氧化锰粉末，有气泡产生的是过氧化氢溶液
D	检验蜡烛燃烧的产物中是否含有二氧化碳	在火焰上方罩一只沾有澄清石灰水的烧杯

安徽宏村被誉为“画里的乡村”，村中建筑密集排布，小巷狭仄，且巷中遍布水道，民居白墙黑瓦，房屋山墙多采用“马头墙”（指高于两山墙屋面的墙垣，也就是山墙的墙顶部分，因形状酷似马头，故称“马头墙”）的形式。下图为安徽宏村实景图，读图，据此完成下面小题。

阅读下面两首诗，完成下面小题。

（甲）天净沙·秋思

枯藤老树昏鸦，

小桥流水人家，

古道西风瘦马。

夕阳西下，

断肠人在天涯。

（乙）秋词

刘禹锡

自古逢秋悲寂寥，我言秋日胜春朝。

晴空一鹤排云上，便引诗情到碧霄。

Read the passage and fill in the blanks with proper words (在短文 空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给)

    I get up at 7:30 and get dressed for school. My school has a uniform: black trousers and shoes, a white shirt and a black and gold tie. The girls wear the same, or they can wear a black skirt. We also have a black sweatshirt or we can wear a black jacket. Not all British students must wear uniforms, but it's a r in our school.

    I don't live far from the school, so I walk there with my friends, Brian and Gemma. Lots of students catch the school bus or their parents d them to school. On Mondays we all start the day with Assembly(集会) in the school hall at 8:50. The headmaster talks to us and gives us information about school efor the whole week.

    This year I've got nine s. We all study English, Maths and Science, and then we choose others. My favorites are IT and Art&Design. Brian likes Spanish and Japanese. Gemma is brilliant at Maths, so she goes to an Advanced Maths class.

    We have 20 minutes for a b in the morning and an hour for lunch. Some students bring sandwiches to school for lunch, but my friends and I always eat in the dining room where you can get a hot meal every day.

    Lessons end at 4 o'clock, but on Mondays and Wednesdays I stay at school until 5 o'clock. I to the Photography Club and the Athletics Club. There are lots of clubs and activities at our school. Brian g to the Film Club and Gemma plays in the school band.

    At the end of the day I always spend two hours on homework, sometimes three hours. We get lots of homework now, for we've got our f exam in June. After all, every one of us hopes to achieve a satisfying academic performance at school.

把肯定句改成双重否定句。

①楚王尊重晏子了。

②我班被评为先进集体，全班同学都感到自豪。

口算．

8＋8=

4＋8=

6＋9=

7＋5=

3＋8=

I (not live) near the school. So l (leave) home early.

选择适当的试剂除去下列物质中的杂质(括号内为杂质)，写出有关反应的离子方程式或化学方程式：

阅读下文，回答问题。

摩拜单车使用方法

（摩拜单车使用方法）：

一，使用条件：①要有能上网的智能手机；②能在网上充值，如微信钱包或支付宝。二，注册：在手机下载《摩拜单车官网手机客户端下载/上海摩拜单车app下载》软件，并安装。

接着按照要求进行注册操作，阅读协议：一是绑定手机号码，填写验证码；二是押金充值299元，押金可随时返还；三是实名认证，填写身份证号码等。这些操作按照提示一步步完成即可，最后显示“注册成功”。下面就可以用车了。

三，用车和还车：

①用车：⑴点击手机“摩拜单车”图标，打开软件，可以看到周围摩拜单车状况；⑵点击“距离最近”字样后，即显示找车路线和距离等数据。可点击预约，保留车15分钟，途中遇到合适车，可取消预约，改用另车。当然也可不预约车，不过你看上的车也有可能被先到人骑走；⑶找到车后，点击APP上的扫码开锁字样，即打开扫码镜头，对准车上的“扫码骑走”二维码，成功后听到开锁声音，即可用车；⑷骑行中，APP跟踪显示车到位置、骑行时间和距离等。

②还车：到目的地后，将车放在可以停放非机动车辆的地方，无需进行手机操作，只需手动将锁扣下压合上锁环，此时应听到关锁声。停止计时。在手机上显示“骑行结束页”，显示骑行时间和支付金额等。至此，还车结束，完成一次摩拜单车的骑用。

（摩拜单车app使用说明）：

摩拜单车app跟政府提供的租车对比，无须市民卡，门槛低，支付宝或微信交299押金，即可骑车，就算是来旅游的外地游客也可以使用。摩拜单车app半小时1元租车费，价格亲民（扣分多的话，价格不亲民了，一定要按规定停车）。

友情提醒：

①在注册时要阅读协议，明确权利和义务；

②打开软件后，点击左上角的菜单，里面有用户指南等，有些不明白的看一下就知道。

③为节约数据流量，准备工作最好在WiFi上网的条件下完成。

（选自《互联网》，有删改）

硅酸钙(CaSiO₃)是玻璃的主要成分之一。硅酸钙中Si的化合价是（    ）

阅读理解

    Throughout history scientists have risked their health and their lives in their search for the truth.

    Sir Isaac Newton, the seventeenth century scientist, was very smart, but that didn't stop him from doing some pretty stupid things. In his laboratory in Cambridge he often did the strangest experiments. Once, while testing how light passes through lenses (晶状体), he put a long needle into his eye, pushed it to the back, and then moved it around just to see what would happen. Luckily, nothing long-lasting did. On another occasion he stared at the sun for as long as he could bear, to discover what effect this would have on his sight. Again he escaped suffering permanent damage, though he had to spend some days in a darkened room before his eyes recovered.

    In the 1750s the Swedish chemist Karl Scheele was the first person to find a way to produce phosphorus (磷). He in fact discovered eight more chemical elements including chlorine (氯), though he didn't get any praise for them. He was a very clever scientist, but his one failing was a curious habit of tasting a little of every substance he worked with. This risky practice finally caught up with him, and in 1786 he was found dead in his laboratory surrounded by a large number of dangerous chemicals, any of which might have been responsible for his death.

    Eugene Shoemaker was a respected geologist. He spent a large part of his life studying craters (火山口) on the moon, and how they were formed, and later did research into the comets of the planet Jupiter. In 1997 he and his wife were in the Australian desert where they went every year to search for places where comets might have hit the earth. While driving in the Tanami desert, normally one of the emptiest places in the world, another vehicle crashed into them and Shoemaker was killed on the spot. Some of his ashes (骨灰) were sent to the moon aboard the Lunar Prospector spacecraft and left there — he is the only person who has had this honor.

叶肉细胞比细菌细胞多的结构是（   ）

—______ floor do you live on?

—The ground floor.

写出修辞方法。

①狐狸们的脚印闪着光芒，象一道金光一直延伸到密林深处。

②一对象牙就像两支铁镐，在地上挖掘起来。             

③海鸥纷纷落地，竟在老人遗像前后站成了两行。

④哥哥的声音像洪钟一样响亮。       

我国是一个幅员辽阔、疆域广大的国家，下列说法可信的是（   ）

明明和华华做同一组计算题，明明用 小时完成，华华用 小时完成，（    ）做得快些。

2019年是平年，2020年是闰年。（    ）

下列说法中，正确的是（    ）

依次填入下列句子横线处的词语，最恰当的一项是（    ）

①公益与每个人      。在互联网时代成长起来的“微公益”，真正实现了公益的平民化、常态化。

②在上海举行的第48届世界乒乓球赛上，我国运动健儿       ， 一举囊括五项冠军。

③“最美女教师”张丽莉在危急时刻舍己救人的壮举让许多人     地流下了热泪。

下列叙述中，正确的是（    ）