在氯化铁、氯化铜和盐酸的混合溶液中加入铁粉，待反应结束所剩余的固体滤出后能被磁铁 发布时间：2017-04-06 14:34 │ 来源：www.tikuol.com 题型：选择题 问题： 在氯化铁、氯化铜和盐酸的混合溶液中加入铁粉，待反应结束所剩余的固体滤出后能被磁铁吸引，则反应后溶液中存在的较多的阳离子是 A．Cu2+B．Fe3+C．Fe2+D．H+
题型：选择题 完形填空。 Look, this is __1__ bedroom. It is __2__old house, but it is very nice. There __3__ a clock and some pictures __4__ the wall. There is __5__ on the desk. His backpack is __6__ the chair. His coat is on the bed. Where is __7__ baseball? It is __8__ the door. What's that? Oh, __9__ a cat! It __10__ a hat. ( )1. A. Jim ( )2. A. a ( )3. A. is ( )4. A. at ( )5. A. keys ( )6. A. on ( )7. A. a ( )8. A. behind ( )9. A. That's ( )10. A. look like B. Jims B. an B. am B. on B. a set of keys B. in B. the B. in B. It B. look C. Jims's C. the C. are C. in C. a set of keyC. between C. an C. under C. Its C. looks like D. Jim's D. the D. be D. for D. key D. out D. \ D. between D. It's D. look after 查看答案
题型：选择题 杆AF、BE、EF相互铰接，并支承如图所示。今在AF杆上作用一力偶（P，P′），若不计各杆自重，则A支座反力作用线的方向应：（）A.过A点平行力PB.过A点平行BG连线C.沿AG直线D.沿AH直线 查看答案
