【简答题】Task 1 Complete the sentences in the following summary according to the passage. Payless ShoeSource is an American discount footwear retailer which was founded in 1._______ in 1956. Thanks to its rev...
【单选题】Scott thought of himself as a very successful marketer. He created a campaign with a product logo that was very popular and that customers associated with a quality product. It was so popular that in ...
A.
Too much repetition was decreasing the strength of the CS, thus leading to extinction of the learned relationship between the logo, the quality of the product, and the association with Scott's company.
B.
Customers confused Scott's logo with the logo of Scott's competitors, making cognitive learning incomplete.
C.
The logo produced only a fixed-ratio schedule of reinforcement that did not sustain sales, while Scott's competitor used a variable-ratio schedule.
D.
Over time the logo became boring, and customers punished Scott's company by buying competitors' products as a type of revenge for their boredom.
【简答题】(普通班)已知椭圆 ( a > b >0)的焦距为4,且与椭圆 有相同的离心率,斜率为 k 的直线 l 经过点 M (0,1),与椭圆 C 交于不同两点 A 、 B . (1)求椭圆 C 的标准方程; (2)当椭圆 C 的右焦点 F 在以 AB 为直径的圆内时,求 k 的取值范围. (实验班)已知函数 R). (Ⅰ)若 ,求曲线 在点 处的的切线方程; (Ⅱ)若 对任意 恒成立,求实数 的取值范围...