问题
选择题
每人名人都用自己的行为写着自己的一生，以下错误的是 [ ]
A、曹雪芹——《红楼梦》
B、司马光——《资治通鉴》
C、李白——《石壕记》
D、郑板桥——《兰竹图》
答案
答案：C
搜题请搜索小程序“爱下问搜题”
每人名人都用自己的行为写着自己的一生，以下错误的是 [ ]
A、曹雪芹——《红楼梦》
B、司马光——《资治通鉴》
C、李白——《石壕记》
D、郑板桥——《兰竹图》
答案：C
| 选出能填入空白处的最佳选项。 | |
Tom: Can I go out and play now? Mother: If you have finished your homework. Tom: 1. _____ Mother: Oh no! Just sit down and finish it now. You'd never do any if I didn't make you, would you? Tom: Yes, I would. 2 _____ Mother: Never mind about football. You will never do well at school if you don' you're your homework. Tom: 3 _____ Mother: Well, we would. 4 _____ Tom: I don't know. But just think how pleased he'd be if I got on the football team. Mother: 5 _____ Tom: He says he would play football all day if he were my age again. 1._____ 2._____ 3._____ 4._____ 5._____ |
OC―COOH，可简写为H2C2O4)俗称草酸，易溶于水，属于二元中强酸(为弱电解质)，且酸性强于碳酸，其熔点为101.5℃，在157℃升华。某校研究性学习小组为探究草酸的部分化学性质，进行了如下实验：
HCO3溶液的试管中加入足量乙二酸溶液，观察到有无色气泡产生。该反应的离子方程式为_______
__________________________________。