皮皮学，免费搜题
登录
搜题
【单选题】
混合碱试样,以酚酞为指示剂,使用浓度为0.1578 M 的盐酸滴定至终点,消耗HCl28.95 ml,接着以甲基橙为指示剂滴定至终点,又耗去HCl22.56 ml,则混合碱组成为( )A.
NaHCO3+Na2CO3
B.
NaOH+Na2CO3
C.
无法判断
D.
NaOH
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】To tell you the truth, I became a college student at 15. _____. [ ]
A.
You must be
B.
Thank goodness
C.
You don't say so
D.
It doesn't matter
【单选题】If you want to change for a double room, you'll have to pay ______ ＄15．
A.
another
B.
other
C.
more
D.
each
【单选题】Can I help you? .
A.
Yes, I can.
B.
Yes, please.
C.
No, you are not.
D.
No, you will not.
【单选题】－－－ Who are the teenagers gathering at the school gate? －－－ Well, if you _____ know, they are al
A.
15. --- Who are the teenagers gathering at the school gate? --- Well, if you _____ know, they are all my visiting students. A．need
B.
must
C.
may
D.
Will
相关题目：