皮皮学，免费搜题
登录
搜题
【单选题】
现有 50mL 某二元酸 H 2 X, c (H 2 X) = 0.1000mol/L, 用 0.1000mol/L NaOH 滴定。在加入 25mL NaOH 时 ,pH = 4.80; 加入 50mL NaOH, 即在第一化学计量点时 , pH = 7.15, 则 K a2 值为 ( B )A.
5.62×10 -10
B.
3.2×10 -10
C.
8.4×10 -9
D.
7.1×10 -8
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
【单选题】When you are writing a business fax, you should not to:
A.
Write the telephone number of your fax.
B.
Write the telephone number of the recipient.
C.
Omit the sender ’ s name.
D.
Write the number of pages of your fax.
【单选题】When you writing a business fax, you should not to:
A.
write the telephone number of your fax.
B.
write the number of pages of your fax.
C.
write the telephone number of the recipient phone.
D.
omit the sender's name.
【单选题】When you are writing a business fax, you should NOT to:
A.
Write the telephone number of your fax.
B.
Write the number of pages of your fax.
C.
Write the telephone number of the recipient phone.
D.
Omit the sender’s name.
【单选题】What is the writing style. of a fax?
A.
Cut out unnecessary words.
B.
Use short and incomplete sentences to save money.
C.
Rewrite to simplify.
D.
There is no special style. of writing required.
【简答题】公司的行业地位分析的侧重点是（ ）。
【简答题】公司的行业地位分析的侧重点是（ ）。
【单选题】公司的行业地位分析的侧重点是( )。
A.
对公司所在行业的市场结构进行分析
B.
对公司所在行业的生命周期进行分析
C.
对公司在行业中的竞争地位进行分析
D.
对公司所在行业的成长性进行分析
相关题目：
参考解析：
知识点：
题目纠错 0
发布
