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【简答题】
桔梗断面形成层环呈棕色,皮部类白色,木质部淡黄色,这种颜色差异习称 。
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皮皮学刷刷变学霸
举一反三
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/Muy
D.
MUx/MUy=Px/Py
【单选题】Which area of academic study is not mentioned by the speaker when he talks about scientific advances in 17th century Britain?
A.
Biology.
B.
Chemistry.
C.
Medicine.
D.
Astrology.
【单选题】It can be inferred that the author holds a positive attitude towards______.
A.
top scientific journals
B.
filter then publish mechanism
C.
studies from star scientists
D.
open-access megajournals
【单选题】For some time now, Chinese people, under the leadership of CPC, ______ the contents of the Scientific Development Theory in the course of practicing socialism in China.
A.
had been improving
B.
have been improving
C.
were improving
D.
improved
【单选题】Why do those promoters think the tanning machines are healthy?
A.
Because they are scientifically designed.
B.
Because they have high quality control.
C.
Because they can emit those harmful rays.
D.
Because they are comfortable.
【多选题】消费者购买X和Y两种商品,当实现消费者均衡时,下列等式成立的是
A.
MUx/Px=MUy/Py
B.
MRSxy=Px/Py
C.
MRSxy=MUx/MUy
D.
MUx/MUy=Px/Py
【单选题】With suffi cient scientifi c information a manned trip to Mars should be ______ .
A.
obtainable
B.
potential
C.
considerable
D.
feasible
【多选题】假设w某消费者只购买两种商品X和Y,当满足( )时,消费者均衡能够实现。
A.
MRSxy =Px/Py
B.
MRSxy =MUx/MUy
C.
MUx/Px =MUy/Py
D.
无差异曲线与预算线相切
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