在目前热风炉结构条件下,单用高炉煤气,采用热风炉废气预热助燃空气与煤气的办法也达不到

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问题:

在目前热风炉结构条件下,单用高炉煤气,采用热风炉废气预热助燃空气与煤气的办法也达不到()的风温.

考点:炉前工高级炉前工高级炉前工题库
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何首乌具有的功效是

A.补血,润肺止咳
B.滋阴,补益心脾
C.解毒,润肠通便
D.养血,益胃生津
E.敛阴,补血益精

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一个仓库有10吨水果,运走
3
5
后,又运进
3
5
吨.这个仓库现在有水果______吨.
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主要技术经济指标是对确定的施工方案及施工部署的()进行全面的评价。

A.内容

B.工期

C.工程概况

D.技术经济效益

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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) .

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遗传性胰腺炎是人类一种常染色体显性遗传病,某重症联合免疫缺陷病是伴X染色体隐性遗传病,下图是某家族患遗传性胰腺炎病和某重症联合免疫缺陷病的遗传系谱图。

Ⅲ—2与Ⅲ—3婚配后,准备生育后代。

①如果胎儿是男孩,则他同时患两种病的几率为();进一步确定此男孩携带哪种致病基因,可采用()方法。

②Ⅲ—3产前检查时,对从羊水分离到胎儿脱落的细胞进行系列分析,确定胎儿的基因型为aaXbXbY。胎儿性染色体多了一条的原因是()(父亲、母亲)的生殖细胞形成过程发生了()

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