烧结料层中宏观上呈（）气氛。 A.还原 B.氧化 C.中性

For more than two centuries, American’s colleges and universities have been the backbone of the country’s progress. They have educated the technical, managerial, (1) and provided generation after generation of national leaders. Today educators from around the globe are turning to U. S. institutions of higher learning (2) . They are apt to find many reasons for the excellence of American universities, but (3) stand out as watersheds:
Education (4) : In 1862 Congress enacted the Land-Grant College Act, which essentially extended the opportunity of higher education (5) , including such disenfranchised groups as women and minorities. Each state was permitted to sell large tracts of (6) and use the proceeds to endow at least one public college.
(7) : Over the years, the decentralization and diversity of the America’s colleges and universities have promoted competition for students and resources. Competitive pressure first arose (8) . The academy’s impact really grew after World War II, when (9) commissioned by President Roosevelt argued that it was the federal government’s responsibility to (10) for basic research. Instead of being centralized in government laboratories, scientific research (11) in American universities and generated increasing investment. It also gave graduate students research opportunities and helped (12) far and wide, to the benefit of industry, medicine and society as a whole.
(13) : The end of the World War II saw passage of the Servicemen’s Readjustment Act of 1944. The law, which provided for (14) for returning veterans, made an already democratic higher-education system accessible in ways that were (15) in Europe, opening the doors of the best universities to men and women who had (16) of going to college.
(17) : The creation of federal loan guarantees and subsidy programs, as well as outright grants for college students brought (18) to higher education and further helped to democratize access. Since its founding (19) , the Federal Family Education Loan Program has funded more than 74 million student loans worth more than (20) .

某菊酯类卫生用药改建项目占地面积25万m²，厂房建筑面积9万m²，厂区绿化面积4900m²。厂区三面环山，一面临河，是全国农药行业的重点企业之一。公司现有5个主要生产车间，分别为甲胺磷车间、菊酯车间、粉剂车间、乳剂车间和悬浮剂车间。其中，甲胺磷车间的生产能力为4000t/a，菊酯车间的生产能力为200t/a，乳剂车间的生产能力为10000t/a，粉剂车间的生产能力为2000～3000t/a，悬浮剂车间的生产能力为2000～3000t/a。企业主要的产品类别是有机磷类农药和拟除虫菊酯类卫生用药。主要排放的大气污染物是TVOC和甲苯。主要工程包括：甲胺磷生产车间、菊酯生产车间、乳剂车间、粉剂车间、悬浮剂车间、锅炉房、供冷机房、办公楼、循环冷却水系统、供配电系统、给排水系统、消防系统、成品仓库、危险化学品仓库、剧毒品仓库、车间配有废水预处理站、甲醇回收设施、有机废气冷凝回收系统、除尘设施和水洗塔、包装废桶存放区等。

环境风险防范措施有哪些？

江苏省以园林城市著称的是[     ]

A．南京市

B．无锡市

C．苏州市

D．常州市

图示的两个单元体，已知正应力σ=165 MPa，切应力=110 MPa。则两个单元体的第三、第四强度理论表达式为（）。

A．A

B．B

C．C

D．D

电焊导线中间不应有接头，若有接头，接头处应远离易燃易爆物品5米以外。