皮皮学，免费搜题
登录
搜题
【简答题】
图（A）为电解水生成气体与时间关系图，图（B）是电解水的简易装置。试回答下列问题： （1）写出此反应的符号表达式 ，属于 反应。（填基本反应类型） （2）若甲试管生成气体A，则甲应连接电源的 极（填“正”或“负”），气体B用 的木条（填“带火星”或“燃着”）来检验。 （3）0s～3s内甲试管内气体的体积比与8s时甲试管内气体的体积比 （填“相同”或“不同”），这一现象产生的原因可能是： 。 （4）在水通电分解的变化中，发生改变的粒子是（写出具体微粒名称） ，最小的粒子是 。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】语法填空 I needed his help 1 ______I had very little education. I began school at six. The school 2_ _____ I studied for only two years was three kilometres away. I had to leave because my family could no...
【简答题】首字母填空。 School education(教育) is very important and useful. Yet no one can l 1 everything at school and a teacher can't teach his students e 2 they want to know. His job is to s 3 his students how to le...
【单选题】可溶性汞盐因易吸收而毒性较大。口服氯化汞 多少 可致 中毒 ( )。
A.
0.3～2g
B.
0.1～0.2g
C.
0. 2 5～0. 3 5g
D.
0.05～0.25g
【简答题】根据短文内容及首字母提示，填写所缺单词。(本题共10小题；每小题1分，满分10分) School education is very i__小题1:__ and useful. The students both learn k__小题2:__ and get an education. Yet, no one can learn e__小题3:__ from school. The scient...
【单选题】I needed _______ off from school education to experience life.
A.
sometime
B.
some time
C.
sometimes
D.
some times
【单选题】下列描述中哪个不是二级语言知识---语音的标准描述。
A.
正确读出26个英文字母。
B.
知道单词是由字母构成的。
C.
了解单词有重音，句子有重读。
D.
了解英语语音包括连读、节奏、停顿、语调等现象。
【简答题】缺词填空。 School education(教育) is very important and useful. Yet no one can l 1 everything at school and a teacher can’t teach his students e 2 they want to know. His job is to s 3 his students how to lea...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
