is an economic scenario in which households and investors sit on cash; either in short-term accounts or literally as cash on hand.
A liquidity trap
B. Inflation
Crunch credit
D. Recession
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碱性顺序:A 麻黄碱 B.小檗碱C.莨菪碱
A>B>C
B. A>C>B
C. B>C>A
D. B>A>C
E. C>A>B
碱性顺序:A麻黄碱B小檗碱C莨菪碱D胡椒碱
A>B>C>D
B. A>C>B>D
C. B>C>A>D
D. B>A>C>D
E. C>A>D>B
碱性顺序:A.山莨菪碱B.东莨菪碱C.莨菪碱
A>B>C
B. A>C>B
C. B>C>A
D. C>B>A
E. C>A>B
硅光电池在()情况下有最大的功率输出。
A. 开路
B. 短路
C. 自偏置
D. 反向偏置