问答题
同温同压下的O2和H2,若体积相同,则两种气体的物质的量的之比为____,分子个数之比为____。
【参考答案】
(1)
1;1:1;1:1 (2)
1;1:1;1:1
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The market is a concept. If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the manager of the local supermarket. But in either case, you are producing for the market. Your efforts are being directed by the market. If people stop buying tomatoes, you will stop producing them.If you take care of a sick person to earn money, you are producing for the market. If your father is a steelworker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.When you spend your income, you are buying things from the market. You may spend money in stores, supermarkets, gas stations, and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.The market may seem to be something abstract. But for each person or businessman who is making and selling something, it's very real. If nobody buys your tomatoes, it won't be long before you get the messagE.The market is telling you something. It's telling you that you are using energies and resources in doing something the market doesn't want you to do.Which of the following would be the best title for the passage?A.Selling and Buying.B.What is the Market?C.Everything You Do Is Producing for the Market.D.What Can the Market Do for You?
A.B.
C.
D.
Which
E.Selling
F.
B.What
G.Everything
H.
D.What
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单项选择题
代谢与排泄过程统称为( )。
A.转运
B.处置
C.消除
D.生物转化
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