course, he

　　can’t. Then you take a glass of water. You put your finger

　　in ∧water

　　the

　　and then move it slow round the rim of the glass, as shown in the picture. Your finger

　　slowly

　　must not be much wet, but it must not

　　be dry. So you must try many time. At

　　very/too

　　times

　　last you will hear clear music which comes from the

　　glass. When your finger moves round the rim, it makes the glass to vibrate and the glass makes a musical voice. The

　　sound

　　same principle makes the violin or its strings give music. The America

　　and

　　American

　　scientist Benjaming Franklin made a musical instrument out of glass bowls. He used the different principle.

　　same

　　书面表达

　　【参考范文】

　　A good relationship benefits us all

　　As a middle school student, I think it necessary to build a good relationship with our teachers, for it is the teachers who show love and concern for us students in study and life. We students can always seek support and advice from them, from which we benefit and learn a great deal.

　　In this case, an ideal relationship between teachers and students is very important. In my opinion, this relationship should be one filled with love, care, understanding and respect, so we can exchange ideas freely. To build a relationship of this kind, teachers should become our friends while we students ought to trust teachers and express our feelings frankly. Only by joint efforts can we enjoy a warm relationship between teachers and students, and live a happy and harmonious life.

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