【单选题】What was the woman worried about?
A.
She would not survive the disease.
B.
She would not be able to pay for the medical bill.
C.
She would not be able to pay back Dr. Kelly's kindness.
D.
She would not spread her love to other people.
【单选题】在维持效用水平不变的前提下,消费者增加一单位某种商品的消费量时所需要放弃另一种商品的消费数量。这被称为( )
【判断题】在维持效用水平或满足程度不变的前提下,消费者增加一单位的某种商品的消费时所需放弃的另一种商品的消费数量,被称为商品的边际替代率。
【单选题】You needn't ___________ your English. I will help you. [ ]
【判断题】商品的边际替代率,是指在维持效用水平不变的前提下,消费者增加一单位某种商品的消费数量时所需要放弃的另一种商品的消费数量。
【简答题】Reading comprehension. Students often meet with questions as follows: bullied by someone, worried about a weak subject, puzzled by family problems or concerned about pets at home. All the questions ab...
【简答题】What was Jim worried about? Jim was worried about his ______ in the park.