According to the passage, all of the following led to the development of writing EXCEPT th
A.need to keep records
B.desire to write down beliefs
C.extraction of ink from plants
D.growth of social complexity
A.need to keep records
B.desire to write down beliefs
C.extraction of ink from plants
D.growth of social complexity
A.need to keep records
B.desire to write down beliefs
C.extraction of ink from plants
D.growth of social complexity
A、increases
B、decreases
C、reduces by half
D、has no effect on
A、(AB)'=A'+B'
B、(XYZ)'=X'+Y'+Z'
C、(A+B+C)'=A'B'C'
D、all of these 全部都是
A、Hong Kong.
B、Macao.
C、Guangzhou.
D、Honolulu.
A、content words and functional words
B、native words and borrowed words
C、basic words and dialectal words
D、loan words and dialectal words
A.A meeting with Professor Simpson
B.An English composition class
C.An appointment for tutoring
D.Information about the Learning Center
A.The author intends to discuss the issue of global warming with top government leaders.
B.The author lays stress on the research of the climate of the earth.
C.The author attaches paramount importance to the protection of the earth"s environment.
D.The author considers the relation between automating and environmental pollution.
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