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【简答题】
将下表中的两组反应物1和反应物2混合均能发生化学反应，请根据要求回答下列问题： 编号 反应物1 反应物2 现象 化学方程式 ① 硫酸 氯化钡 有白色沉淀生成 ② 氢氧化钡 硫酸钠 有白色沉淀生成 （1）根据表中给出的实验事实，写出对应的化学方程式：______ （2）从反应前后各溶液中所含离子的角度看，上表中的两个反应实际上是______（填离子符号）和______（填离子符号）之间发生的反应．请按照这个反应的本质，再写一个类似反应的化学方程式（但要求与上表的“反应物1”类别不同，而与“反应物2”类别相同）______；并指出这些反应的基本反应类型属于______．
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【单选题】High-quality customer service is preached ( 宣扬 ) by many, but actually keeping customers happy is easier said than done. Shoppers seldom complain to the manager or owner of a retail store, but instead...
A.
Manners of the salespeople.
B.
Hiring of efficient employees
C.
Huge supply of goods for sale.
D.
Design of store layout.
【单选题】High-quality customer service is preached ( 宣扬 ) by many, but actually keeping customers happy is easier said than done. Shoppers seldom complain to the manager or owner of a retail store, but instead...
A.
exert pressure on stores to improve their service
B.
settle their disputes with stores in a diplomatic way
C.
voice their dissatisfaction to store managers directly
D.
shop around and make comparisons between stores
【单选题】High-quality customer service is preached ( 宣扬 ) by many, but actually keeping customers happy is easier said than done. Shoppers seldom complain to the manager or owner of a retail store, but instead...
A.
can stay longer browsing in the store
B.
won’t have trouble parking their cars
C.
won’t have any worrier about security
D.
can find their cars easily after shopping
【简答题】High-quality customer service is preached ( 宣扬 ) by many, but actually keeping customers happy is easier said than done. Shoppers
seldom complain to the manager or owner of a retail store, but instea...
【简答题】中国数学史上最先完成勾股定理证明的数学家是公元3世纪三国时期的()
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