酸溶液中都含有大量H⁺，因此不同酸表现出一些共同性质，下列关于盐酸性质的描述中，不属于酸的共同性质的是（　　）

下列各式中，与$\sqrt{2}$是同类二次根式的是（　　）

阅读以上5段语言材料，请找出与他们相对应的标题，并将其标号填入下列方框内。
    A Friendship Day present plays an important part in developing friendships. We must choose it with love and care. It doesn't need to be expensive, but it must be able to show your love to your friend. If you find it hard to choose a good Friendship Day present for your best friend, here are some good ideas for you.
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    Friendship bands are one of the most popular present on that day. Many colorful friendship bands hit stores much ahead of the Friendship Day. They come in special designs for both boys and girls.
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    Flowers are presents which are popular among girls. Sending flowers is the best and the easiest way to show your love to your friend. If possible, you'd better choose your friend's favorite flower. If your friend doesn't have a specific choice, you can buy yellow roses. Yellow roses are thought to be Friendship Day flowers.
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    Photo albums are good Friendship Day presents. You can place a picture of you along with your friend into a photo album. This reminds both of you of the good time you spent together.
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    21Books are suitable for friends who like reading. Keep your friend in mind while choosing the book. Usually, you can choose an inspirational.
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    If you don't know which present to choose, why not invite your friend to have dinner? That will be a good chance to chat with your friend. I am sure you can have a good meal and a great time.

E.Buying Friendship Bands

列举孔子的有关教育的言论（三句话）：____、____、____。