【简答题】已知 E 、 F 、 G 、 H 分别是空间四边形 ABCD 的边 AB 、 BC 、 CD 、 DA 的中点. (1)用向量法证明 E 、 F 、 G 、 H 四点共面; (2)用向量法证明: BD ∥平面 EFGH ; (3)设 M 是 EG 和 FH 的交点, 求证:对空间任一点 O ,有 .
【单选题】2018 年上半年,全国政协主席 、中共中央台办主任刘结一等多次与国民党高层人士、县市长、民意代表,新党主席以及台湾工商界、媒体界等各界人士会面,汇聚坚持“九二共识”、推动两岸关系和平发展的共识和力量,画出了致力两岸关系和平发展的最大同心圆。岛内各界纷纷要求民进党当局承认“九二共识”,早日回到两岸关系和平发展的正确道路上来。
【简答题】单向板肋梁楼盖荷载的传递途径为荷载→ → → → → →地基。
【单选题】It issued an import warning on Chinese frozen spinach using the ( ) of higher-than-required amounts of pesticide residue. 日本发出了针对中国冻菠菜的进口警告,借口是杀虫剂的残留物高于要求的标准。
【简答题】阅读理解 The Ivy League is an athletic conference comprising eight private institutions of higher education in the Northeastern United States.The term is most commonly used to refer to those eight schools...
【判断题】The writer thinks that the foreigners entitled "Chinese scholars"understand the treasure of civilization contained in the higher classical Chinese in Chinese literature.
【简答题】单向板肋梁楼盖荷载的传递途径为 板 → → → → →地基 。
【单选题】__ __ many Chinese women have received higher education, there are still obstacles that prevent them from enjoying the same opportunities for education and employment as men.