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材料一：（涉黑涉恶）聚众斗殴、强迫交易、敲诈勒索、非法拘禁、寻衅滋事、开设赌场、强迫卖淫等都是涉黑涉恶的行为，但是有少数公民参与其中。

材料二：（扫黑除恶）湖南省自2018年1月23日开展扫黑除恶专项斗争以来，一方面向黑恶势力发起猛烈的攻击，让众多横行已久的黑恶团伙成雪崩式瓦解，极大地增强了人民群众的安全感；另一方面多名涉嫌充当“保护伞”的党政干部和政法干警被调查，同时广大群众积极向公安机关举报黑恶势力，提供了大量有价值的线索。

结合材料运用所学知识：

已知 是抛物线 的焦点， 为抛物线上的动点，且 的坐标为 ，则 的最小值是（    ）

如图所示，某人用轻绳拉着小车在平直路面上匀速运动。下列说法正确的是（   ）

根据录音，判断图片是否正确。

把“底面、底面周长、高”填入右侧圆柱侧面展开图中合适的位置．

一个正方形方阵，最外层每边站了4位同学，整个方阵有（　　）人．

2019年是澳门回归20周年，这是澳门繁荣稳定发展的20年。澳门回归祖国（    ）

短周期元素R、X、Y、Z在周期表中相对位置如图所示。已知：X原子最外层电子数比其内层电子数多3。下列说法错误的是（   ）

一张100元能换张50元，能换张10元，能换张1元。

One bag, that's it.

    The importance of packing light cannot be overemphasized(过度强调). Limit yourself to 20 pounds in a carry-on bag. A 9’× 22’ ×14’ bag fits under most airplane seats. And after you enjoy that sweet mobility and freedom, you'll never go any other way.
    You'll walk with your luggage(行李) more than you think you will. Before leaving home, give yourself a test. Pack up completely, and practice being a tourist for an hour. Fully loaded, you should enjoy window-shopping. If you can't, go home and thin things out.
Packing light isn't just about the trip over and back—it's about your traveling lifestyle. Too much luggage marks you as a typical tourist. It slams the back door shut. Changing locations becomes an important operation. With only one bag, you're mobile and in control. Take this piece of advice seriously. Pack light, and pack smart. These days, you can't bring anything possibly dangerous—such as knives, lighters or large amounts of liquid (液体)—in your bag.
What to bring?
    How do you fit a whole trip's worth of luggage into a small backpack or suitcase(衣箱)? The answer is simple: bring very little.
Bring out everything you think you might need on the floor. Pick up one item(件) at a time and check it. Ask yourself—not “Will I use it?”, but—“Will I use it enough to feel good about carrying it all the way? The world is getting really small—you can buy Colgate toothpaste, Nivea cream and Gillette razors in almost every country.
    Think about what you can do without—not what will be convenient on your trip. When in doubt, leave it out.

下列有关水绵和水稻两种植物共同特征的叙述，错误的是（  ）

完形填空

    1name is Mike. I'm 102 old. It's 6:30. It's time 3get up. But where is my shirt? My shirt is blue. Oh, it's 7:00. Where4 my black shoes? Are they under the bed? No, 5 aren't. They'rebehind the door.

【旅游地理】

图是“新疆冰川分布示意图”，新疆旅游部门计划禁止游客攀登冰川，只允许远观。其中，天山一号冰川是世界上离城市最近的冰川，近几十年来一直处于后退状态。

分析天山一号冰川后退及当地政府禁止游客攀登冰川的主要原因。

佳佳最喜欢玩给娃娃搭配服装的游戏。一顶帽子搭配一条裙子，一共有几种不同的搭配？

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Don'tyou just love ice skating every winter? I am sure that since winter isapproaching, your skates are set to come out, just waiting to be used. Impressyour friends with a new trick on how to ice­skate backwards with the help ofthese trips.

Stand straight

 The first thing that you need to do is standstraight.， if you feel that you are falling backwards. Don't worry；this happens to all.

 Confidence is what you need

Themost important step while learning how to skate backwards is having enoughconfidence in yourself and in what you are doing. How can you achieve this? Bypractice. One of the important ice skating tips and techniques is that if youfeel that you are losing your balance, then scissor (做剪式运动) your skates.

 Maintain speed

 Try sculling with one skate while rolling in astraight line with the

 other.Now bring the skate which you are using to scull, and then again,repeat the same process. Make sure that you put most of your weight on theskate which is moving straight and not the one with which you are sculling.Now, try the same thing using the other foot.

 Once you are confident that you can scull witheither foot, the next thing that you have to do is increase your speed. Trysome of your own tricks now. Scull with either foot or with both at the sametime.

 Scull and be aware

 While you keep one foot straight, keepsculling with the other. You can do that with both feet at the same time.，but don't get so involved that you don't see where you are going. If you arenot watching your back, you might just bang into something or someone.

A．That is, keep pushing yourself backwards with an outwardstroke(滑动)

B．While going backwards, just get used to the feeling ofmoving backwards

C．Keep practicing this till you are confident about it

D．Increase your speed now

E．One must be brave enough to learn to ice­skate backwards

F．Concentrate on what you are doing

G．Just put your chin up and slightly bend your knees

下列电路中，小灯泡不能发光的是(    )。

向日葵在生活过程中要呼吸，需要（）

5×5=（   ）

图①、图②、图③都是6×6的正方形网格，每个小正方形的边长均为1，每个小正方形的顶点叫做格点， 的顶点都在格点上，在给定的网格中，按下列要求画图，只用无刻度的直尺，只保留作图痕迹，不要求写出画法．

“国家应在经营范围、原料供给、销售市场、劳动条件、技术设备、财政政策、金融政策等方面，调剂国营经济、合作社经济、农民和手工业者的个体经济、私人资本主义经济和国家资本主义经济，使各种社会经济成分在国营经济领导之下，分工合作，各得其所，以促进整个社会经济的发展。”此段话符合下列哪一文件的精神（    ）