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问题 选择题

相同温度下，两种氨水A、B，浓度分别是0.2 mol/L和0.1 mol/L，则A和B的OH－浓度之比[ ]

A．大于2            

B．小于2            

C．等于2              

D．不能确定

答案

答案：B

单项选择题

(二)


Many people who work in London prefer to live outside it, and to go in to their offices or schools every day by train, car or bus, even though this means they have to get up early in the morning and reach home late in the evening.
One advantage of living outside London is that houses are cheaper. Even a small flat in London without a garden costs quite a lot to rent. With the same money, one can get a little house in the country with a garden of one’s own.
Then, in the country one can rest from the noise and hurry of the town. Even though one has to get up earlier and spend more time in trains or buses, one can sleep better at night and during weekends and on summer evenings, one can enjoy the fresh, clean air of the country. If one likes gardens, one can spend one’s free time digging, planting, watering and doing the hundred and one other jobs which are needed in a garden. Then, when the flowers and vegetables come up, one has the reward of one who has shared the secret of Nature.
Some people, however, take no interest in country things: for them, happiness lies in the town, with its cinemas and theatres, beautiful shops and busy streets, dance-halls and restaurants. Such people would feel that their life was not worth living if they had to live it outside London. An occasional walk in one of the parks and a fortnight’s (two weeks) visit to the sea every summer is all the country they want: the rest they are quite prepared to leave to those who are glad to get away from London every night.

People who think happiness lies in the town would feel that ______ if they had to live it outside London

A．their life was meaningless

B．their life was invaluable

C．they didn’t deserve a happy life

D．they were not worthy of their happy life
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判断题

分光光度法的测量误差随透射率变化而存在极大值。
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