题目内容
（请给出正确答案）
All epidemic diseases spread through people's sneeze, human contact and insects.
A．Y
B．N
C．NG
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（由简答题聘请的专业题库老师提供的解答）
更多“All epidemic diseases spread through people's sneeze, human contact and insects.A．YB．NC．NG”相关的问题
A、cooper
B、stone
C、bian stone
D、iron
A、He has to flee.
B、He is arrested and sent to the prison.
C、He is captured and hanged.
D、He is put in jail for life.
E1=ezE01e-jkz,E2=ezE02e-jkz
(1)E1、E2是否满足▽2E+k2E=0？
(2)由E1、E2求磁场强度复矢量，并说明E1、E2是否表示电磁波。
W: Oh, I love it. It's so convenient. I can take the bus to work, or the subway, or the taxi. And there is so much to do.
M: I know what you mean. I'd like to live in the city, too, but to live in the suburbs is better for children.
W: Well, there are a lot of good things about suburban living. But, as a Working woman, I think a city has all the conveniences—including the best food and fastest news.
M: But there are more trees, grass and fresh air in the suburbs.
W: Yeah, but living in a city, it's convenient to go everywhere. There are lots of movie houses, theaters and so on. You can take them to the suburbs on the weekends.
M: Yeah, children are the right age. There are lots of things for them here.
W: You are right. They are at the library in Brooklyn. And they come back home for lunch, then go uptown to the Museum of Natural History. There is so much for young people to see and do.
M: Not just for young people. What about me？ I've never been to the Museum of Natural History.
W: Neither have I. When I was a child, I used to go to the Museum of Art.
M: I've been there several times. Twice with children.
W: Well, I have an idea. Next weekend, we go to the Museum of Natural History.
M: Ok, that's really a very nice idea.
(23)
A．They are looking for an apartment to live m.
B．They are discussing living places and children's education.
C．They are complaining about their children.
D．They are planning for the next Weekend.
A．Y
B．N
C．NG
The simplest way to increase food production, one might suppose, is to bring more land【B1】cultivation and put more people to work on it. Some of the underdeveloped countries have resorted to this【B2】approach, without notable success. It contains several fallacies. For one thing, it usually means【B3】into marginal lands where the soil and climatic conditions give a poor【B4】. Cultivation may quickly deplete this soil,【B5】it for pasture or forest growth. It is often possible, of course, to turn such lands into useful farms by agricultural【B6】; for instance, a sophisticated knowledge of how to use the available water【B7】an irrigation system may reclaim semi-arid grasslands for crop-growing. But the cultivation of marginal lands is in any case unsuccessful【B8】it is carried out by farmers with a centuries-old tradition of experience or by modern experts with a detailed knowledge of the【B94】conditions and the varieties of crops that are suitable for those conditions. Such knowledge is【B10】absent in the underdeveloped countries.
【B11】, we know that highly developed countries have not increased the【B12】of acres under cultivation,【B13】on the contrary have【B14】their marginal lands and steadily reduced the proportion of the population engaged in fanning. Efficient fanning【B15】concentration on the most efficient lands, and it results in greater production with【B16】people. The problem of the underdeveloped countries, then is to increase the【B17】of their farms and farmers. This would allow them to industrialize and to feed their people more adequately. It is not easy to【B18】, however. The farmers are conservative and resistant to change【B19】their methods of cultivation. The underdeveloped countries are greatly in need of studies and experiments to help them to【B20】modern agricultural methods to their own conditions.
【B1】
A．under
B．of
C．by
D．in
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