化工生产中常用MnS作为沉淀剂除去工业废水中的Cu2+:Cu2+(aq)+MnS(s) CuS(s)+Mn2+(aq),下列说法错误的是( ) A.MnS的Ksp比CuS的Ksp大 B.该反应达平衡时c(
痰形成的部位是( ) A. 鼻腔 B. 喉 C. 气管和支气管 D. 食道黏膜
.---I am sorry. I should not have been so rude to you. --- You _________ your temper but that’s Ok. A. have lost B. had lost C. did lose D. were losing
Bill White’s father is a lawyer. In his 41 time, he likes to get out in the country and take some 42 of animals. For a long time, Bill had wanted to go with his father on
历史告诉我们,新真理通常是以异端开始的。罗马教皇和天主教教会是西欧中世纪以来社会的主宰力量,他们把一切新思想斥之为异端邪说。14—16世纪
图所示装置先放暗处一昼夜,然后用铝箔纸将甲叶片全部包裹,乙叶片不包裹。在连续照光数天后,摘下甲、乙叶片通过去除叶绿素和漂洗后,再滴加
如果P(m+3,2m+4)y轴上,那么点P的坐标是( ) A、(-2,0) B、(0,-2) C、(1,0) D、(0,1)
东南亚的主要热带经济作物( ) A.天然橡胶、椰子、甘蔗、棉花 B.天然橡胶、可可、咖啡、油棕 C.天然橡胶、椰子、蕉麻、油棕 D