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用边长1厘米的小正方形拼成下面的图形，周长最短的是（    ）.

中国特色社会主义进入新时代，我国社会主要矛盾已经发生转化。下列数据中能反映这一新的主要矛盾的是（    ）

是虚数单位，则 的虚部是（   ）

如果有两杯体积相同但温度不同的水，那么它们的重量也一定相同。

根据左边句子的意思从右边选择合适的答语。

⑴Where is the science museum? ⑵Does Sarah go to work by bus?    ⑶How old is your pen pal?    ⑷What are you going to do today?    ⑸Is your mother a scientist?

A. Yes, she does. B. No, she isn't. C. I'm going to draw pictures. D. She is fourteen years old. E. Near the cinema.

浏阳（28°N）夏至日时，为使太阳能热水器的效率最高，则太阳能热水器集热板与楼顶水平面的夹角应为（    ）

2020年4月29日，宁波市十五届人大五次会议胜利闭幕。会议审议了政府工作报告，票决选出了2020年宁波市民生实事10大项目。这充分体现了（    ）

①全国人民代表大会制度是我国的根本制度

②人民代表大会具有监督权和决定权

③人民当家作主是我国社会主义民主的本质

④我国的一切权力属于人民代表大会

   

数一数，填一填。

属于溶液的是（   ）

给下列划线的字注音。

颤动	凝望	安慰	柔软	疲倦	覆盖

在下面的方格纸上分别画一个锐角、直角和钝角．

阅读理解

    In Europe, there is no escape for those who do not appreciate art and architecture(建筑). It is a heaven for people who want to feel like they have been transported to famous historical time periods from America. For me, Europe was a complete contrast from America. London and France had a more royal feel than New York, and Rome felt more ancient. I wasn't just on a different continent; it felt like I was in a different century.

    My parents and I visited London, Paris and Rome this summer in celebration of the end of my high school experience. It was supposed to be a break from a life as busy as a bee in New York, the constant stress, the crowded subway rides, and the weary body that had accompanied me for the last four years. It was an opportunity to appreciate Europe the way I couldn't do it just by reading history books.

    My favorite parts of London were the Tower of London and the Churchill War Rooms. As a site of past executions(刑场), the Tower of London displayed punishing devices from the 16^th and 17^th century and told stories of various members of the royal family who had ever been imprisoned in the tower, some even imprisoned by their own family members when they were seen as a threat to the crown. Besides that, I also got to see the royal family's crown jewels, amazingly beautiful.

    The Churchchill War Rooms, though very different from the Tower of London, were also spellbinding from a historic perspective. I am not a history fan, but I enjoy museums, and I took fancy in the Churchchill Museum inside the War Rooms that detailed the events of Churchchill's life and World War II. Everything I saw in it built up his life from his childhood to his last years, creating a three-dimensional Churchchill in my mind who was a person just like myself. He longed for more, he made mistakes, he experienced loneliness and sadness. But he had also done some remarkable things like uniting Britain during World War II.

    Our rewarding trip ended in Rome a couple of days later.

已知 ， ，若 存在两个零点，则 的取值范围是（   ）

根据要求完成短文写作, 请将作文写在答题卡指定的位置上。

假如你是Jim, 你的朋友Lily的英语成绩一直不好。她的主要问题是没有养成良好的学习习惯。阅读上面的文章后, 请你写一封信告诉她如何培养良好的学习习惯。内容包括：

1）说明朋友Lily存在的问题；

2）培养良好学习习惯的方法（2-3种）；

3）鼓励她不要放弃, 继续努力。

作文要求：

1）不能照抄原文；不得在作文中出现学校的真实名称和学生的真实姓名。

2）语句连贯, 词数80个左右。作文的开头和结尾已经给出, 不计入总词数。

Dear Lily,

It usually takes me about half an hour （ride） to school.

历史上活跃在丝绸之路上，成为东西方文化交流使者的是（　　）

现代类人猿和人类的共同祖先是（　　）

描出下列各点并依次连成封闭图形，看看是什么图形。

化简： ，并挑选合适的值代入求值．