函数y=x2﹣2x﹣3,x∈[0,3]的值域是 ().

题型:填空题

问题:

函数y=x2﹣2x﹣3,x∈[0,3]的值域是  (    ).

考点:二次函数的性质及应用函数的定义域、值域
题型:填空题

人民防空实行( )的方针,贯彻与经济建设协调发展、与城市建设相结合的原则。
①长期准备;②重点建设;③统筹兼顾;④平战结合

A.①②③④
B.①②③
C.②③④
D.①②④

题型:填空题

引起脑膜炎的病原体有()

A.脑膜炎奈瑟菌

B.结核分枝杆菌

C.新型隐球菌

D.钩端螺旋体

E.白喉棒状杆菌

题型:填空题

当坠落物高度为30m以上时,坠落半径为()。

A.5m

B.6m

C.7m

D.8m

题型:填空题

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.

20()

A.fair

B.just

C.square

D.objective

题型:填空题

党的十六大确定的本世纪头二十年的奋斗目标是什么?

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