【单选题】消费者购买 X 、 Y 两种商品,假设 X 商品的价格为 5 , Y 商品的价格为 7 ,且 MRS XY =5 ,消费者为了达到的最大效用,他应当。
A.
增加 X 商品的购买量,减少 Y 商品的购买量
B.
减少 X 商品的购买量,增加 Y 商品的购买量
C.
增加 X 商品的购买量,同时增加 Y 商品的购买量
D.
减少 X 商品的购买量,同时减少 Y 商品的购买量
【单选题】我国谚语中的“螳螂捕蝉,黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中,捕食黄雀并栖息于林中。下列叙述正确的是
【单选题】消费者购买X、Y两种商品,假设X商品的价格为5,Y商品的价格为7,且 MRS=0.5,消费者为了达到最大效用,他应当( )。
【单选题】—I’m sorry, but I didn’t mean out your secret. —But you know, letting out one’s secret means one’s feelings.
【单选题】听力原文:M: Wow. I slept like a log. For one, I really feel rested and ready to go. W: Hold it a second. How about treating ourselves to breakfast in bed for a change. Q: What can we learn from this dialo...
A.
They had a sound sleep last night.
B.
They had a telephone call, but the line was engaged.
D.
After breakfast, she would go to see a doctor for treatment.
【单选题】消费者购买X、Y两种商品,假设X商品的价格为5,Y商品的价格为7,边际替代率MRSxy=0.5,消费者为了达到最大效用,他应当( )
【单选题】According to the fifth parag,aph,what is the suggested method to control underground fires?
A.
Using remote sensing technique.
B.
Controlling the release of carbon dioxide.
C.
Making the soil heat resistant.
D.
Cutting off the oxygen supply.
【单选题】'When one of the doctors criticizes me, I get defensive. I feel like a child again, being scolded, and I want to explain that I'm not wrong,' says Viola, a nurse. This is a common reaction to criticis...
A.
argued bitterly with his employer
B.
was angry and gave up his job
【单选题】单千斤索轻型双吊杆两吊杆头至桅肩的引索称为:()