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You Can Make a Windsock(风筒)

    Have you ever seen a windsock blowing in the wind? Well, you can make one of your own! This is a fun project that you can do with things you may have. You just need to follow a few easy steps.

You will need:

●one piece of heavy colored paper   ●five ribbons

●strong tape       ●a string

●a pencil

What to do:

Step 1: Draw pictures on the paper. You can write your name on it. Do anything that will make it special to you.

    Step 2: Make the paper into the shape of a tube. Hold one of the shorter edges(边缘) over the other. Then make them together with the tape at each end and in the middle.

Step 3: Use a pencil to make a hole into both sides of the tube. The holes should be only on one end of the tube. Pull the string through both holes. Then tie the ends of the string together.

    Step 4: Now make five holes around the top of the other end of the tube.Put a ribbon through each of the holes. Tie a knot in the ends.

    Make sure the knots are bigger than the holes.

    Now your windsock is ready to use, but how does it work? The shape of the tube plays an important part. Wind blows through the tube and makes it fly and dance around. Hold the windsock up in the air by its string and run around. It will fly behind you. You can also hang it outside and watch it dance around on its own!

已知命题$p:\exists x_0\in R^{*},{\log }_2{x}_0=1$，则$\neg p$是（   ）

 化学物质王国中举行节日游戏活动，游戏规则如图所示（图中“→”表示一步反应生成），以形成物质间相互转化的循环接龙．

请你将下列八位队员：①Ca（OH）₂ ②Cu ③CaO ④CO ⑤CaCl₂ ⑥CuO ⑦CO₂ ⑧CaCO₃平均分成红、蓝两队．游戏规定，物质⑤任红队的队长，物质⑦任蓝队的队长，且红、蓝两队的队长均处于甲的位置，两队分别形成循环接龙．

请回答：

（1）红队乙的化学式　____ ．

（2）红队中丙→丁的化学方程式为　____ 　．

（3）蓝队队员依甲乙丙丁的顺序排列是⑦　____ （填序号）．

以下说法中，错误的是(  )