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问题 单项选择题

植物细胞发生渗透作用时，溶剂分子通过的“半透膜”是（）

A.细胞壁、细胞质、细胞

B.细胞膜、细胞质、液泡膜

C.细胞壁、细胞质、液泡

D.细胞壁、细胞膜、细胞质、细胞核

答案

参考答案：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.

When the flowers and vegetables in the garden come up, those ______ have the reward of one who has shared the secret of Nature.

A．Who live in the country

B．who have spent time working in the garden

C．who have a garden of their own

D．who have been digging, planting and watering
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判断题
看图，判断正(√)误(×)。
( ) 1. This is a bridge.
( ) 2. There are many rivers in China.
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