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(4)陈某要求返还价款的主张能否成立为什么

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某建筑公司(乙方)于某年4月20日与某厂(甲方)签订了修建建筑面积为3000m2工业厂房(带地下室)的施工合同。乙方编制的施工方案和进度计划已获工程师批准。该工程的基坑开挖土方量为4500m3，假设直接费单价为4.2元/m2，综合费率为直接费的20%。该基坑施工方案规定：土方工程采用租赁一台斗容量为lm3的反铲挖掘机施工(租赁费450元/台班)。甲、乙双方合同约定5月11日开工，5月20日完工。在实际施工中发生了如下事件。事件1：因租赁的挖掘机大修，晚开工2天，造成人员窝工10个工日；事件2：施工过程中，因遇软土层，接到工程师5月15日停工的指令，进行地质复查，配合用工15个工日；事件3：5月19日接到工程师于5月20日复工令，同时提出基坑开挖深度加深2m的设计变更通知单，由此增加土方开挖量900m*；事件4：5月20日～5月22日，因下大雨迫使基坑开挖暂停，造成人员窝工10个工日；事件5；5月23日用30个工日修复冲坏的永久道路，5月24日恢复挖掘工作，最终基坑于5月30日挖坑完毕。1. [问题]1．建筑公司对上述哪些事件可以向厂方要求索赔，哪些事件不可以要求索赔，并说明原因。2．每项事件工期索赔各是多少天总计工期索赔是多少天？3．假设人工费单价为23元/工日，因增加用工所需的管理费为增加人工费的30%，则合理的费用索赔总额是多少？

不具有完全民事行为能力的

A. 准予注册
B. 不予注册
C. 注销注册
D. 重新注册
E. 撤销注册

活动物可在抵运地检验检疫机构实施检疫，即异地施检报检。( )

A. 对
B. 错

Ironically, in the United States, a country of immigrants, prejudice and discrimination continue to be serious problems. There was often (1) between each established group of (2) and each succeeding group. As each group became (3) financially successful, and more powerful, they (4) newcomers from full participation in the society. Prejudice and discrimination are (5) U.S. history, (6) , this prejudicial treatment of different groups is (7) more unjust than with black Americans. Blacks had distinct (8) . For the most part, they came to the "land of opportunity" as slaves and were not free to keep their (9) and cultural traditions. (10) most European immigrants, blacks did not have the protection of a support group; sometimes slave owners separated members of (11) family. They could not mix easily with the (12) society either because of their skin color. It was difficult for them to (13) the American culture. Even after they became flee people, they were still discriminated (14) in employment, housing, education, and even in public (15) , such as restrooms.

A. therefore
B. moreover
C. consequently
D. however