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问题 选择题

在植物生长过程中，氮肥能使枝叶繁茂，磷肥能使果实饱满，钾肥能使茎杆健壮．种植生菜、波菜等，应多施用的化肥是（　　）

A．Ca（H2PO4）2

B．NH4NO3

C．KCl

D．微量元素肥料

答案

种植食叶蔬菜（如生菜、波菜）应施用较多的化肥是氮肥，氮肥能使农作物枝叶繁茂、叶色浓绿、还能提高产量．

A、磷酸二氢钙中含有磷元素属于磷肥，故A错误；

B、硝酸铵中含有氮元素，属于氮肥，故B正确；

C、氯化钾中含有钾元素，属于钾肥，故C错误；

D、微量元素肥料不属于氮肥，故D错误．

故选B．

单项选择题

在违反治安管理行为构成要件中，( )处于核心地位。

A．危害行为

B．主观要件

C．危害结果

D．主体要件
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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.

4（）

A.proclaimed

B.exclaimed

C.claimed

D.reclaim
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