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【多选题】
Read the information and the chart below. What findings can you report according to the chart?You work in the marketing department of your company and your line manager has delegated to you the task of preparing a short report. You must report on the number of people visiting the company website in the last three months and propose a marketing strategy for the next three months. You have already made some handwritten notes on the information below.【图片】A.
Over the last three months, the number of visitors has increased by 650. There are two reasons for the increase
B.
With regards to costs, banners have cost 3200 euros a month but very few people seem to visit the website as a result of these.
C.
On the other hand, the newsletter doesn’t cost anything (other than my time) but has helped to increase the number of visitors.
D.
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皮皮学刷刷变学霸
举一反三
【简答题】如图所示为光栅衍射光强分布曲线图,光栅透光缝 。问:该光栅的总缝数N=____, 缺级主明纹的级次为k= ,光栅常数为d=____cm。
【单选题】在下操作定义的方法中,( )通过陈述测量结果来界定概念,对所解释对象的动作特征进行描述,对可观测的行为结果进行描述,这种操作性定义用于给( )下定义,解释客体的行为。
A.
条件描述法，自变量
B.
指标描述法，因变量
C.
行为描述法，因变量
D.
条件描述法，因变量
【多选题】操作定义的特征有哪些?
A.
1、应该是 可直接操作的、 可观测的、可重复的。
B.
2、所提示的测量或操作必须要可行。
C.
3、如果指标成分应分解需要到能直接观测、测量为止。
D.
4、最好能把变量转化成数据形式，凡是能计数或计量的内容都是可以直接观测的。
E.
5、可用多种方法形成操作性定义，既可以从操作入手，也可以从测量入手。
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