下面的()体现了非标准设备的特点。 A.按业主提交的图纸和技术要求组织生产 B.由设 发布时间:2017-12-19 12:33 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下面的()体现了非标准设备的特点。A.按业主提交的图纸和技术要求组织生产B.由设备生产厂批量生产C.国家有定型标准的设备D.可以即时交付业主
题型:单项选择题 现有A、B、C、D、E五种盐溶液,分别由K+、NH4+、Ag+、Ba2+、Al3+、Cl-、Br-、CO32-、SO42-、NO3- 中的阳离子和阴离子各一种组成(五种盐所含阴、阳离子各不相同)已知:①A+B→白色沉淀 ②A+D→白色沉淀 ③A+C→白色沉淀④D+B→白色沉淀+无色气体 ⑤A溶液中c(H+)=c(OH-)⑥B溶液中c(H+)=1×10-12mol•L-1 ⑦C、D、E三种溶液的pH<7,根据以上实验事实可以推出(用分子式表示)A为______;B为______;C为______;D为______;E为______.写出以上①②③④各步反应的离子方程式:①______,②______,③______,④______. 查看答案
题型:单项选择题 This morning I found red wallet on the campus. Girls usual like red, so I believed the wallet was belonged to a girl student. I opened it, try to find out whose it was. Therefore, I found nothing but 300 yuan in it. I was wondering what to do with it while suddenly my classmates Chen Yang passed by. She suggested she put up a Lost and Found notice and I did so. I wrote down my telephone number and ask the owner to call me after she saw it. Later, a girl came to claim it on 3 o’clock this afternoon. 查看答案
题型:单项选择题 —Ruth, I want to have some milk.—There's ______ left. What about orange juice? [ ]A. few B. much C. none D. many 查看答案