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问题 单项选择题

某场地采用振冲桩处理，按等边三角形布桩，桩径为1000mm，桩距为2000mm，桩间土承载力特征值为120kPa，桩体承载力特征值为250kPa，处理后场地复合地基承载力特征值为（）。

A.150kPa

B.155kPa

C.160kPa

D.165kPa

答案

参考答案：A

填空题

Beijing: The United States and North Korea had their first ______ in four months here this afternoon as part of the ______ negotiations on how to end North Korea’s nuclear program, but diplomats played down prospects for______. James A. Kelly, assistant ______, and Kim Yong Ⅱ, North Korea’s deputy foreign minister, met ______ of formal discussions, ______ on direct dialogue that began after a stormy meeting ______ in which North Korea warned that it was moving quickly to ______ nuclear arms. The Bush administration had insisted ______ that it would only hold talks with North Korea ______ because, it argued, only ______ pressure would persuade North Korea to______. It got its way when North Korea dropped its insistence on ______ and agreed, after extensive efforts by China, to hold unusual simultaneous negotiations with ______,______,______ and ______ as well as the United States. Though Bush administration officials had not ______ talking privately with the North Koreans during______, the fact that Mr. Kelly and Mr. Kim met on the first day was seen as a sign of ______ by the American side.
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问答题 简答题

成本性态的特点是什么？
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