皮皮学，免费搜题
登录
搜题
【单选题】
244用盐酸滴定氢氧化钠溶液时,下列操作不影响测定结果的是( )。A.
酸式滴定管洗净后直接注入盐酸
B.
锥形瓶用蒸馏水洗净后未经干燥
C.
锥形瓶洗净后再用碱液润洗
D.
滴定至终点时，滴定管尖嘴部位有气泡
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
【简答题】市场营销的相关核心概念有哪些?
【单选题】在生物膜法处理废水系统中,出水回流的主要作用是( )。
A.
保证生物膜反应器的污泥浓度维持在一定范围；
B.
为了回流硝酸盐，以保证脱氮效率；
C.
提高生物膜反应器的水力负荷，加大水流对生物膜的冲刷作用，更新生物膜；
D.
为了使含磷污泥充分释放。
【单选题】Proper street behavior. in the United States requires a nice balance of attention and inattention. You are supposed to look at a 【21】______ just enough to show that you're 【22】______ of his presence. ...
A.
friend
B.
foreigner
C.
passerby
D.
stranger
【简答题】市场营销的核心概念是什么？市场营销有哪些相关概念？
【单选题】_______is proper behavior in the workplace.
A.
Wearing sandls
B.
Arriving on time
C.
Sleeping on desk
【单选题】The proper behavior makes others _________.
A.
feel at home
B.
to feel in the home
C.
feel in the home
D.
to feel at home
【单选题】Courtesy also includes proper behavior. on the street. Proper street behavior. requires a nice【C1】______ of attention and inattention. You are supposed to look at a【C2】______ just enough to show that ...
A.
state
B.
assumption
C.
balance
D.
coherence
【单选题】Proper street behavior. in the United States requires a nice balance of attention and inattention. You are supposed to look at a 【21】______ just enough to show that you are 【22】______ of his presence....
A.
friend
B.
foreigner
C.
passerby
D.
stranger
【单选题】Proper street behavior. in the United States re quires a nice balance of attention and inattention. You are supposed to look at a【B1】just enough to show that you are【B2】of his presence. If you look to...
A.
friend
B.
foreigner
C.
passerby
D.
stranger
相关题目：