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【单选题】
某消费者逐渐增加某种商品的消费量,直到达到了效用最大化,在这个过程中,该商品的A.
总效用和边际效用不断增加
B.
总效用不断增加，边际效用不断下降
C.
总效用不断下降，边际效用不断增加
D.
总效用和边际效用不断下降
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】列入总进口的项目有
A.
供国内使用而直接进入的进口货物
B.
进入海关保税工厂的进口货物
C.
进入海关保税仓库和自由区的进口货物
D.
从海关保税仓退出后进入本国市场的货物
E.
从自由区退出后进入本国市场的货物
【简答题】The largest animal ever to live on Earth is the blue whale（鲸鱼）. It weighs(重) about 80 tons-more than 24 big elephants. It is more than 30 metres long. A new baby whale weighs as much as a big elephant...
【多选题】列入总进口的项目有
A.
供国内使用而直接进入的进口货物
B.
进入海关保税工厂的进口货物
C.
进入海关保税仓库和自由区的进口货物
D.
从海关保税仓库退出后进入本国市场的货物
E.
从自由区退出后进入本国市场的货物
【单选题】电路图中T80/3中80/3的含义是( )
A.
代表某个电器元件
B.
80代表电器元件的插脚总数为80个
C.
3 代表电器元件的插脚总数为3个
D.
3代表接线端子的位置
【单选题】I ________ myself more—it was a perfect day. (2013·浙江，3)
A.
shouldn’t have enjoyed
B.
needn’t have enjoyed
C.
wouldn’t have enjoyed
D.
couldn’t have enjoyed
【单选题】Football is played in more than 80 countries, it the most popular sport around the world.
A.
making
B.
to make
C.
having made
D.
and make
【单选题】could not 3 have scored more than 80
A.
always
B.
possibly
C.
certainly
D.
Frequently
【简答题】阅读理解。 The largest animal ever to live on Earth is the blue whale. It weighs about 80 tons more than 24 elephants. It's more than 30 meters long.A newborn baby whale weighs as much as a big elephant. C...
【单选题】—You were driving at 100 km an hour, sir. —But officer, I ________. My car can’t go more than 80.
A.
may not have to
B.
couldn’t have been
C.
wouldn’t like to
D.
needn’t to be
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