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【简答题】
Most people want to be happy, but few know how to find happiness. Money and success alone do not bring lasting happiness. Aristotle, a Greek thinker, said, "Happiness depends upon ourselves." In other words, we make our own happiness. Here are a few suggestions to help you be happier. The first secret of happiness is to enjoy the simple things in life. Too often, we spend too much time thinking about the future-for example, getting into college or getting a good job-that we fail to enjoy the present. You should enjoy life's simple pleasures, such as reading a good book, listening to your favorite music, or spending time with close friends. People who have several close friends often live happier and healthier lives. Another secret to living a happy life is to be active. Many people go dancing or play sports. People can forget about their problems and only think about the activities. Finally, many people find happiness in helping others. Studies show that people feel good when they spend their time helping others. If you want to feel happier, do good things for someone. You can help a friend with his or her studies, go shopping to buy food for an elderly person, or simply help out around the house by washing the dishes.
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【单选题】某三元酸 H 3 A p K a1 = 3.96 、 p K a2 = 6.00 、 p K a3 = 10.02, 则 0.10 mol/L Na 3 A 溶液 pH 是
A.
8.01
B.
10.02
C.
11.51
D.
12.51
【单选题】用(()切削时可以中途加入冷却液
A.
金刚石刀具
B.
B,硬质合金刀具
C.
高速钢刀具
D.
陶瓷刀具
【单选题】采用( )切削时可以中途加入冷却液。
A.
金刚石刀具
B.
硬质合金刀具
C.
高速钢刀具
D.
陶瓷刀具
【单选题】Que Dieu ______ les misérables souffrir et qu'il les _____
A.
voie, protège
B.
voit, protège
C.
verra, protègera
D.
verrait, protègerait
【单选题】( )切削时可以中途加入冷却液。
A.
金刚石刀具
B.
硬质合金刀具
C.
高速刚刀具
D.
陶瓷刀具
【单选题】Les restaurants qu'il a m'intéressent.
A.
présenter
B.
présenté
C.
présentée
D.
présentés
【单选题】Supérieurement doué, il a obtenu tous les diplômes qu’il a ______.
A.
voulu
B.
voulus
【简答题】Qu'est-ce qu'il y a ______ intéressant pour les enfants ?
【单选题】( )切削时可以中途加入冷却液。
A.
高速钢刀具
B.
硬质合金刀具
C.
金刚石刀具
D.
陶瓷刀具
【单选题】其他条件相同,人离接地点越近时可能承受的( )。
A.
跨步电压和接触电压都越大
B.
跨步电压越大、接触电压不变
C.
跨步电压不变、接触电压越大
D.
跨步电压越大、接触电压越小
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