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一个肉蛋类食物交换份的重量、能量、蛋白质、脂肪、糖类分别是
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In medicine， all will change except that__________. 查看材料
Listening to the Jazz music can help drivers relax. 查看材料
术后膳食脂肪宜选择()。
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Look After Your Voice
Often speakers， at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in your mouth. First gently bite the edges of your tongue with your teeth. Or， press your entire tongue to the bottom of your mouth and hold it there until the saliva flows. Or you can imagine that you are Slicing a big juicy lemon and sucking the juice.
Before you begin your talk， be kind to your voice， Avoid milk or creamy drinks which dry your throat. Keep your throat wet by drinking a little sweetened warm tea or diluted fruit juice.
If you sense that you are losing your voice， stop talking completely. In the meantime， do not even talk in a low voice. Save your voice for your health. You may feel foolish using paper to write notes， but the best thing you can do is to rest your voice. If it is necessary ， perhaps you can get some advice from a professional singer.
What about drinking alcohol to wet your throat？ I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything， but in fact your brain and your mouth do not work together properly. Save the alcohol until after you finish speaking.
Perhaps you want to accept the advice， but you may wonder if you can ever change the habits of a lifetime. Of course you can. Goethe， who lived before indoor skating rinks or swimming pools， said， "We learn to skate in the summer and swim in the winter". Take this message to heart and give yourself time to develop your new habits. If you are willing to change， you will soon be able to say that you will never forget these techniques because they became a part of your body.
To solve the problem of dry mouths， one is advised to take cool milk. 查看材料
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