题目内容
（请给出正确答案）
[单选题]
采用L4（23）、L8（27）和L16（215）三种正交表进行试验时，下列阐述哪一个正确（）？
A.试验次数不同、因素不同、水平不同
B.试验次数不同、因素不同、水平相同
C.试验次数不同、因素相同、水平不同
D.试验次数相同、因素相同、水平不同
提问人：网友sitpretty
发布时间：2022-01-07
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A.L32(231)
B.L16(45)
C.L18(37)
D.L12(211)
E.L8(27)
题目内容
（请给出正确答案）
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数据分析结果表明，温度不均匀确实是造成尺寸波动的主要原因，由于改变窑温均匀性成本较高，因此，小组决定通过改变配方来减小尺寸对温度的敏感程度。为此，准备利用试验设计来选择合适的配方，试验中考察4个因子，每个因子选择三水平，并考虑其中2个因子的交互作用，可选择的试验方案为()。
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B.L27(313)
C.L8(27)
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第5题
听力原文：Earthquakes often happen near volcanoes, but this is not always true. The centers
听力原文： Earthquakes often happen near volcanoes, but this is not always true. The centers of some are【L1】______. The bottom of the sea suddenly【L2】______. The powerful forces inside the【L3】______break the rocks. The coast is shaken and great waves appear. These waves travel【L4】______and rush over the land when they reach it. They are strong enough to【L5】______houses and other buildings; sometimes they break【L6】______than the earthquake itself. Very often fires followed the【L7】______earthquakes. In 1906, the great earthquake at San Francisco broke the gas-pipes. The gas【L8】______, and soon large numbers of fires were burning in the city. The water-pipes were also【L9】______; so it was not possible to put the fires out. There was【L10】______. The Tokyo earthquake of【L11】______happened just before the middle of the day. People were【L12】______on their fires at that time. When the ground shook, the fires shook too.【L13】______were thrown on the different parts of the houses, some of which were【L14】______. Soon 134 fires were burning in the city. What kind of building【L15】______in an earthquake？ A building with concrete walls is perhaps the best. A【L16】______will make it even stronger. The frame. holds the【L17】______together, and the walls do not easily fall. There is【L18】______of fire because concrete and steel do not burn. The Americans【L19】______the results of the earthquake in San Francisco, and they are convinced that this kind of building is the【L20】______.
The centers of some are【L1】______.
第6题
听力原文： I am honored to be here today,【L1】______...
听力原文： I am honored to be here today,【L1】______Harvard at this celebration of the College Boards half century of working to promote【L2】______and equal opportunity in higher education. Before I say anything else, I want to thank everyone in the room for the work you do every day to make college【L3】______, available, and【L4】______for millions of young people across the country. I want to focus my remarks on a matter of【L5】______to American familiesand to the future of the nation -- restoring education to its proper role as a【L6】______to equal opportunity and【L7】______in our society. This has been an【L8】______in higher education, with great and creative efforts made by many institutions. Earlier this year, we announced a new【L9】______at Harvard aimed at the students from families of low and【L10】______income. Under our new program, families with incomes of【L11】______will no longer be expected to contribute to the cost of attending Harvard for their children. Families with incomes of less than $ 60,000 will also see their【L12】______reduced. We are proud of this effort at Harvard, but we are aware that the programs of individual institutions with means can never be a substitute for our shared【L13】______to provide adequate funding for Pell grants and other financial aid, and for the state and community college systems that make higher education【L14】______and affordable for the【L15】______. There is something empty about【L16】______initiatives that may be right for one institution without attention to their broader impact.【L17】______, we【L18】______if we urge changes in national policy without doing what we can on our own campuses. In this spirit, I want to【L19】______today a problem that is emerging with【L20】______in this nation.
【L1】______Harvard at this celebration of the College Boards
第7题
根据所给资料，回答下列各题。 2011年7月份以来．受部分地区工业用电需求增长过快、部分地区持续高
温干旱等影响，我国火力发电、电煤消耗屡创新高。 从消耗看，7月份，全国日发电量六次突破历史新高，全国重点电厂日均耗煤401万吨，同比增加75万吨，增长23%，比6月份增长l0．8%。 从供应看，7月份，全国原煤产销量平稳较快增长；铁路煤炭运量1．8亿吨，同比增长7．8%。其中电煤运量l．3亿吨，增长10．3%；主要港口发运煤炭5643万吨。煤炭进口1753万吨，增长36．2%，创单月进口量的历史新高。 从库存看，截至8月16日，全国重点电厂存煤6214万吨。各大电网的存煤都只能维持数天，其中华北电网l4天、华东电网l3天、华中电网l8天、南方电网l4天，均属正常水平。主要港口存煤量增加，8月16日秦皇岛、曹妃甸、京唐港三港合计存煤l358万吨，比6月末增力n320万吨，秦皇岛存煤量达到745万吨。 2011年6月份全国重点电厂日均耗煤（）。
点击查看答案
A.326万吨
B.362万吨
C.368万吨
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第9题
依据《中华人民共和国行政处罚法》，对当事人不予处罚的情形是 A.已满l4周岁不满l8周岁的人有违法行
依据《中华人民共和国行政处罚法》，对当事人不予处罚的情形是
A.已满l4周岁不满l8周岁的人有违法行为的
B.违法行为在1年内未被发现的
C.主动消除或者减轻违法行为危害后果的
D.配合行政机关查处违法行为有立功表现的
E.违法行为轻微并及时纠正，没有造成危害后果的
