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11-15 Recent years have brought minority-owned businesses in the United States unprecedented opportunities as well as new and significant risks. Civil rights activists have long argued that one of the principal reasons why Blacks, Hispanics, and other minority groups have difficulty establishing themselves in business is that they lack access to the sizable orders and subcontracts that are generated by large companies. Now Congress, in apparent agreement, has required by law that businesses awarded federal contracts of more than $ 500, 000 do their best to find minority subcontractors and record their efforts to do so on forms filed with the government. Indeed, (some federal and local agencies) have gone so far as to set specific percentage goals for apportioning part of public works contracts to minority enterprises. A. avoid competition with larger, more established concerns by not expanding B. concentrate on securing even more business from that corporation C. try to expand its customer base to avoid becoming dependent on the corporation D. use its influence with the corporation to promote subcontracting with other minority concerns [简答题]DKZ5型车的动车转向架与拖车转向架有什么区别？
[判断题]用电功率因数的高低,不会影响到供电的电压质量。
A.正确 B.错误 [单选题]在三相系统中，()将三芯电缆中的一芯接地运行。
A.不得 B.可以 C.应 D.不应 [判断题]根据《新奥能源安全生产管理规定》危险物品的生产、经营、储存单位从业人员超过一百人的，应当设置安全生产管理机构或者配备专职安全生产管理人员。
A.正确 B.错误 [单项选择]________were reported by the weather station in Chicago.
A. Sunny skies B. Cloudiness, but no rain C. light showers D. Thunderstorms [判断题]被烧死的柴油机喷油嘴经疏通后，可以继续使用。
A.正确 B.错误 [单选题]现场设备铭牌上参数没有标示（）。
A.流量 B.扬程 C.电压 D.轴功率 [单项选择]电子束在真空中焊接，不仅可以防止金属受到( )等有害气体的污染，而且还有利于焊缝金属的除气和净化。
A. H2、O2、CO B. CO2、H2、N2 C. H2、O2、N2 D. H2、CO、CO2 [单项选择]目的在于使片衣表面光亮，且有防潮作用的工序是（）。
A. 隔离层 B. 粉衣层 C. 糖衣层 D. 有色糖衣层 E. 打光 [多项选择]液压系统常见故障有：压力失常、欠速、振动和噪声、（）、液压油的污染、系统温升、空气进入和产生气穴、水分进入系统与系统内部的锈蚀、（）、液压冲击、液压卡紧或其他卡阀现象。
A. 爬行 B. 寸动 C. 放炮 D. 炮鸣 [单选题]测量工作的基本原则中“先控制后碎部”,是对( )方面做出的要求。( )
A.测量布局 B.测量程序 C.测量精度 D.测量质量 [简答题]动火区域划分
[单选题]依据《中国南方电网有限责任公司电力安全工作规程》规定，作业人员有权依据本规程拒绝违章指挥和强令冒险作业，在（）的情况时，有权停止作业或采取可行的应急措施后撤离作业场所，并立即报告
A.安全 B.发现危及人身安全 C.拨打电话 D.接受检查 [单选题][T]BD012 4 1 3
下列选项中,不属于液压油泵性能参数的是( )。 A.压力 B.排量和流量 C.功率 D.安装尺寸 我来回答: 提交
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