一座造型相当别致精细的欧洲古堡式建筑,用花岗石砌成,墙面图案以精美鹅卵石拼嵌,它描述 发布时间:2017-05-04 04:11 │ 来源:www.tikuol.com 题型:单项选择题 问题: 一座造型相当别致精细的欧洲古堡式建筑,用花岗石砌成,墙面图案以精美鹅卵石拼嵌,它描述的是()。A.总督府官邸B.总督府C.花石楼D.胶澳帝国法院
题型:单项选择题 用since或 for填空。1. I've been practicing the piano 10:30.2. Maria has been running 15 minutes.3. Sarah has been sleeping 9:00.4. Dale has been talking on the phone five minutes.5. Louie has been studying he was six years old.6. I've been watching you ten minutes.7. The Lin family has been living in the neighborhood August. 查看答案
题型:单项选择题 如图甲所示,在水平桌面上放一个重GA =20 N的木块A,已知木块与桌面间的动摩擦因数μA=0.4,那么: (1)使木块A沿桌面做匀速直线运动的水平拉力F为多大? (2)如果再在木块A上加一块重GB =10 N的木块B,如图乙所示,已知B与A之间的动摩擦因数为μB=0.2,那么当A、B两木块一起沿桌面匀速运动时,所需的水平拉力F'为多大? 查看答案