题目

Directions:For each blank in the following passage there are four words or phrases marked A,B, C and D. Fill in each blank with the word or phrase that best fits the context. Retailers(零售商) closed more than 9,000stores in2019. Some people call what has happenedto the shopping landscape the retail1 It is easy to chalkit up to the rise of e-commerce, which has thrived while physical stores struggle.But this can be2. Online sales have grown tremendously inthe last 20 years, but Internet shopping still represents only 11 percent of theentire retail sales total. Collectively, three major3fo（08年乌鲁木齐诊断性测验二） 若椭圆上一点与其中心及长轴的一个端点构成等腰直角三角形，则此椭圆的离心率为A．　　　　B．   　     C．　　　　D．