[A] key[B] door[C] hospital[D] zoo[E] school[F] hands[G] factory You can see all kinds of animals there.
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请根据下面短文回答: Mary is a beautiful girl. She studied in a college in London a year ago. When she left London, she returned to the town where she was born. And she found work in a middle school. She teaches her students French there. She sings and dances well and she likes her work. So she makes friends soon and most people in the town know her. She often takes part in all kinds of meetings and parties and she always sings or dances for the people. She spends a lot of time on it. Sometimes she goes to bed late and can’t get up on time. Of course she’s often late to go to work. Mr. Read, the headmaster(校长), is strict(严格)with everybody. He always stands by the school gate when the first bell rings. Mary has to tell him that her watch is slow. She got home late last night, and this morning she got up late again. She hurried to school without breakfast, but Mr. Read was waiting for her at the gate. "I’m sorry, Mr. Read."said Mary, "My watch…" "Your watch is slow again, isn’t it" the old man said angrily, "I have to say: You’d better change your watch, or I’ll change you.\ What do Mr. Read’s last words mean
A. He told the girl to buy a better watch.
B. He won’t let the girl go to the meetings.
C. The girl will be fired if she’s late again.
It is well-known that the English go out with an umbrella or a raincoat. Why Because the weather in Britain often changes quickly. It is not very usual for the same kind of weather to stay long. Spring can be rainy or windy, but the weather is getting warmer and you can hope more sunny days. In fact there is as much sunshine in spring as in summer. Summer is the best time for visitors to go to the seaside and other places of interest(名胜). The weather can be sunny and nice. People often go out to have a walk or swim. Autumn is a beautiful season, with trees in the woods and parks changing color. During autumn it is still nice to be outside, too. In winter, it gets colder. It might snow, especially(尤其) on high land and in the north. There are also very high winds in this season. January and February are the coldest months of the year, while the warmest are July and August. The difference of temperature between winter and summer is not so great in Britain. The average(平均的)temperature of winter is about 4.5℃, and for summer about 15.5℃. In Britain, there are many high winds in autumn.
A. Right.
B. Wrong.
C. Doesn’t say.
用葡聚糖凝胶柱色谱分离游离黄酮时,主要依靠( )
A. 吸附作用
B. 分配作用
C. 分子筛作用
D. 酸性大小
E. 离子交换作用