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(三) 某桥梁工程施工前,施工单位了解工程地点的地形、工程地质、水文地质和水文条件,掌握了地基土壤种类及其物理学性质、各层土的厚度及标志、周围地区地下水位和地面排水情况,并办理了设计提供的控制桩的交接手续。 施工单位为了做好桥梁工程前期质量控制,编制了施工组织设计和施工方案。 施工各阶段由施工单位编制的施工技术文件严格按有关法规规定签字、盖章后,由建设单位与施工单位分别保存。 问题 施工组织设计的编制的依据是什么

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for China/some economists/are/concerned about/however/a hard landing

A公司2007年12月1日以1000万元取得B公司30%的股权,取得投资时被投资单位可辨认净资产的公允价值为3500万元。A公司能够对B公司施加重大影响,2007年12月31日,A公司对B公司长期股权投资的可收回金额为800万元,则A公司2007年12月31日应计提的长期股权投资减值准备为()万元。

A. 200
B. 250
C. 350
D. 0

He asked whether we could supply sodium hydroxide

Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals(哺乳动物) that evolved on land should have returned to the sea. Those that did have flourished. Within about 50 million years — no time at all, geologically speaking — one of the four kinds of mammals that have returned to a marine environment has developed into the largest of all animal forms, the whale. A second kind, the seal, has produced what is probably the greatest population of large carnivorous mammals on Earth. This suggests that these "top dogs" of the ocean are prospering and multiplying. However, such has not been the case, at least not for the last 150 years. Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators, humans. At sea, as on land, humans have now positioned themselves on the top of the whole great pyramid of life, and they have caused serious problems for the mammals of the sea. There is a simple reason for this. Marine mammals have the misfortune to be swimming aggregates of commodities that humans want: fur, oil and meat. Even so, they might not be so vulnerable to human depredation if they did not, like humans, reproduce so slowly. Every year humans take more than 50 million tons of fish from the oceans without critically depleting the population of any species. But the slow-breeding mammals of the sea have been all but wiped out by humans seeking to satisfy their wants and whims.

According the passage, the main threat to the mammals is ______.
B. A) the polluted marine environment
C) the human beings
D. B) the global warming
E. D) the slow-breeding rate

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