搜题请搜索小程序“爱下问搜题”
问题 解答题

希望小学修一个长80m、宽50m的长方形操场，先要铺一层8cm厚的三合土，再铺煤渣．需要三合土多少方？（1方=1立方米）

答案

8厘米=0.08米，

80×50×0.08，

=320（平方米），

=320方；

答：需要三合土320方．

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.
查看答案
判断题

对于正常运行的变压器要求它的短路阻抗越小越好，而对于变压器发生突然短路时，则要求它的短路阻抗越大越好。
查看答案