皮皮学，免费搜题
登录
搜题
【单选题】
已知 EDTA 的 p K a 1 ~p K a 6 分别为 0.9 , 1.6 , 2.0 , 2.67 , 6.16 , 10.26 。 pH = 11 的 EDTA 二钠盐水 溶液中 , 主要存在形式是 ( )A.
H 3 Y -
B.
H 2 Y 2-
C.
HY 3-
D.
Y 4-
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
【判断题】组织模型的核心是通过CMIP互连的在应用层配置管理实体的一对开放系统,一个担当Manager角色,另一个担当Agent角色,每个系统所承担的角色不是固定的。( )
A.
正确
B.
错误
【简答题】阅读理解。 An 80-year-old man was sitting on the sofa in his house along with his 45-year-old son. Suddenly a crow (乌鸦) landed on their window. The father asked his son, 'What is that?' The son replied, 'T...
【简答题】阅读理解。 An 80-year-old man was sitting on the sofa in his house along with his 45-year-old son. Suddenly a crow (乌鸦) landed on their window. The father asked his son, 'What is that?' The son replied, 'T...
【简答题】现阶段党和国家民族工作的主要任务是什么?
【单选题】在直线与圆曲线之间插入缓和曲线,必须将原来的圆曲线向内移动,这样才能保证缓和曲线起点切于直线上,而缓和曲线终点又与圆曲线上某一点( )
A.
相切
B.
相交
C.
互补
D.
平行
【简答题】秦朝的最高司法机关叫____________
【简答题】An 80-year-old man was sitting on the sofa in his house along with his 45-year-old son. Suddenly a crow(乌鸦) landed on their window. The father asked his son, “What is that?” The son replied, “That is ...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
