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【单选题】
下列反应中熵变为正值的反应是( )。A.
N 2 (g) +3H 2 (g) ⇌ 2NH 3 (g)
B.
CH 3 CH 2 CH 3 (g) ⇌ C 2 H 6 (g) + C 2 H 4 (g)
C.
CuSO 4 (s) + 5H 2 O(l) ⇌ CuSO 4 ·5H 2 O(s)
D.
C 2 H 5 OH(g) ⇌ C 2 H 5 OH(l)
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举一反三
【单选题】The underlined word 'innovations' in Para.2 may be replaced by 查看材料
A.
efficiency
B.
productivity
C.
innovations
D.
transforming
【简答题】Maslow’s hierarchy of needs
【简答题】Maslow’s hierarchy of needs
【多选题】Maslow's hierarchy of needs include .
A.
Physiological needs
B.
Security needs
C.
Communication needs
D.
Esteem needs
E.
Self-actualization needs
【单选题】According to the text, which of the following may lead to enduring innovations in dress?
A.
A fad.
B.
Changing tastes of the public.
C.
A sudden scarcity of a particular material.
D.
The passage of time.
【单选题】According to Maslow's hierarchy of needs, which of the following is 对?
A.
The most pressing needs are placed at the top of the hierarchy.
B.
Physiological needs include a sense of belonging and love.
C.
An individual will try to satisfy least pressing needs first.
D.
Lower-level needs are fulfilled before higher-level needs.
E.
All needs in the hierarchy are biological needs.
【单选题】What can be said about the types of innovations throughout the centuries?
A.
Many innovations are built upon or are improvements of earlier inventions.
B.
A lot of innovations became useless after a while.
C.
At first innovations were to help people; now they are just trendy.
D.
Innovations kept getting more expensive.
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