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问题 选择题

    洋面封冻产生的效应叫做洋面封冻效应，下图是“洋面封冻效应与水、气候、生物相互作用关系示意图”，读图回答1—2题。

 

1、根据图中各项内容之间的相互关系，数字①、②、③所代表的内容分别是 [ ]

A、①气候变暖、②温室作用加强、③气候变暖

B、①气候变冷、②温室作用减弱、③气候变冷

C、①气候变暖、②温室作用减弱、③气候变冷

D、①气候变冷、②温室作用加强、③气候变暖

2、图中由“二氧化碳浓度降低”导致①的过程中，体现出的地理原理是[ ]

A、大气对地面辐射的吸收作用减弱

B、大气对太阳辐射的散射作用增强

C、氯氟烃对臭氧的破坏作用加强

D、大气的保温效应加强

答案

1、D

2、A

单项选择题

Throughout the 19th century and into the 20th, citizens of the United States maintained a bias against big cities. Most lived on farms and in small towns and believed cities to be centres of (1) , crime, poverty and moral (2) Their distrust was caused, (3) , by a national ideology that (4) farming the greatest occupation and rural living (5) to urban living. This attitude (6) even as the number of urban dwellers increased and cities became an essential (7) of the national landscape. Gradually, economic reality overcame ideology. Thousands (8) the precarious (不稳定的) life on the farm for more secure and better paying jobs in the city. But when these people (9) from the countryside, they carried their fears and suspicions with them. These new urbanities, already convinced that cities were (10) with great problems, eagerly (11) the progressive reforms that promised to bring order out of the (12) of the city.

One of many reforms came (13) the area of public utilities. Water and sewerage systems were usually operated by (14) governments, but the gas and electric networks were privately owned. Reformers feared that the privately owned utility companies would (15) exorbitant (过渡的) rates for these essential services and (16) them only to people who could afford them. Some city and state governments responded by (17) the utility companies, but a number of cities began to supply these services themselves. (18) of these reforms argued that public ownership and regulation would (19) widespread access to these utilities and guarantee a (20) price.

6（）

A.predominated

B.dominated

C.commanded

D.prevailed
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名词解释

食用菌育种
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