金属与盐发生置换反应的条件是： ?

>> 高等继续教育 / 中学化学实验设计与研究

高等继续教育 / 中学化学实验设计与研究

正确率：100%

题型描述: 多选题
金属与盐发生置换反应的条件是： ?
A.盐可溶于水
B.金属不能是太活泼的钾、钙、钠等
C.任何条件都可以
D.更活泼的金属才能将比它活动性更弱的金属置换出来
E.置换后金属的质量必增加
F.固态形式更易于置换

积分

中学化学实验设计与研究

参考答案：

点击查看答案

佳题速递：

地下连续墙的混凝土应按照比结构设计规定的强度等级提高5MPa进行配合比设计。高层建筑施工

编码人β2m 蛋白的基因位于医学微生物学和免疫学(护理专)

2、 Washoe, a female chimpanzee (黑猩猩) believed to be the first non-human to acquire human language, has died of natural causes at the research institute where she was kept. The chimp died on Tuesday night, according to Roger and Deborah Fouts, co-founders of The Chimpanzee and Human Communications Institute in Washington, where she lived. Washoe was born in 1965 in Africa, where she was captured by the Air Force and taken to the US for research use in the space program. In 1966, she left the program and began living with two scientists, Allen and Beatrix Gardner, who led a project to teach the chimp American Sign Language (ASL) in Washoe, Nevada, for which it was named. Washoe had been living on Central Washington University’s Ellensburg Campus since 1980. She had a vocabulary of about 250 words. Also, Washoe taught sign language to three younger chimps: Tatu, 31, Loulis, 29, and Dar, 31 Primate (灵长类) researcher Jane Goodall, in Fouts’ book Next of Kin, noted the importance of the work with Washoe. “Roger, through his ongoing conversations with Washoe and her extended family, has opened a window into a chimpanzee’s mind,” Goodall said. Though previous efforts to teach chimps spoken languages had failed, the researchers believed there was a better chance using signs. But Washoe’s language skills were disputed by scientists who believed that language is unique to humans. Among those who doubted that chimps could use language were linguist (语言学家) Noam Chomsky and Harvard scientist Steven Pinker. They believed primates simply learn to perform certain acts in order to receive rewards, and do not acquire true language. w.w.w.k.s.5.u.c.o.m 1. As for its first task, Washoe was involved with _ _ _ _ _ _ _ . A. some space research B. a study on African animals C. an ASL project D. the program of training the Air Force 2. In Goodall’s opinion, teaching Washoe ASL _ _ _ _ _ _ . A. was not successful B. led to the book Next of Kin C. won honor for Fouts D. made a difference 3. In the last paragraph, the underlined word “disputed” probably means “ _ _ _ _ _ _ ”. A. supported B. studied C. questioned D. discussed 4. What can be inferred from the passage? A. The ASL project was first set up in Africa for the study on Washoe. B. Washoe may communicate with other chimps by signing. C. Washoe must have been able to speak 250 words or so. D. The researchers will prove that most chimps could use language. 5. Which of the following is TRUE according to the passage? A. Washoe was the first animal to be taught human language. B. Washoe, the chimp, was named in honor of a place. C. There were four chimps in total at Ellensburg Campus. D. Chomsky believed primates only perform silent signs.综合英语(三)

出卖人不按照约定交付标的物单证的，不影响标的物的毁损灭失风险的转移民法学

若自定义函数不要求返回一个值，则应在该函数说明时加一个类型说明符( )。C语言程序设计

进行顺序查找的条件是______。程序设计基础