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（1）实验室在临时配制一些FeCl 2 的溶液时,氯化亚铁固体先溶于较浓的盐酸中,然后再用蒸馏水稀释到所需的浓度,是为了_____________ ，稀释后还需要加入一些铁粉，其目的是_________________ ，相关反应的离子方程式为____________________________________________________________。 （2）氯化铁水溶液呈____________性,原因是(用离子方程式表示): _______________________________把FeCl 3 溶液蒸干，灼烧，最后得到的主要固体产物是___________。如果要从氯化铁溶液得到纯氯化铁固体,常采用的方法是________________________________________________________________。
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【简答题】In the accompanying figure showing the components of an information system, ____consist(s) of everything in the physical layer of the information system.
【简答题】第七次作业:学习Mooc网站中关于校园网组网的内容:总述+访谈。完成校园网的设计小案例。案例报告中需有:1、校园网需求分析;2、校园网拓扑;3、组网硬件;4、组网软件;5、结构化布线技术;6、校园网VLAN规划;7、其他特色说明。作业截止时间:周日晚9点。作业以Word文档形式在网站中的作业栏目准时提交。
【单选题】In a physical education class, 20 students were tested on archery target shooting. These students were then given a two-day training course in archery technique. The students were tested again and sho...
A.
The students were all excellent athletes, and excellent athletes tend to be good at target shooting.
B.
The first testing session functioned as a practice session for the second testing session.
C.
The accuracy with which people can shoot arrows is strongly related to the sharpness of their vision.
D.
A similar group of students who were also tested on archery target shooting but were not given the course did not show an increase in accuracy.
E.
Excellence in archery target shooting is an accomplishment achieved by relatively few of the people who take up the sport.
【简答题】A．Check out the latest price reduction online. B．Look round for items in the physical stores. C．Order the products from the online stores. D．Wait in queue outside the stores overnight.
【简答题】治疗脾虚食积的代表方剂是( )
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