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问题 多项选择题

复发性单疱病毒性角膜炎中由病毒直接导致损害的类型为（）

A.感染性上皮角膜炎

B.神经营养性角膜病变

C.免疫性基质性角膜炎

D.坏死性基质性角膜炎

E.角膜内皮炎

答案

参考答案：A, C, D, E

选择题

常温下，已知：

4Al(s)＋3O2(g)=2Al2O3(s)ΔH1

4Fe(s)＋3O2(g)=2Fe2O3(s)ΔH2

下面关于ΔH1、ΔH2的比较正确的是(  )

A．ΔH1>ΔH2

B．ΔH1<ΔH2

C．ΔH1＝ΔH2

D．无法计算
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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.

5（）

A.superb

B.super

C.exceptional

D.superior
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