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【简答题】
函数 中自变量x的取值范围是
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举一反三
【简答题】Before the rise of industry people have less ______ since they had to work from dawn to dark with little time allowed for meals.
【单选题】Since the earth’s resources are getting fewer and fewer，recycling industry certainly＿＿big benefits in the near future．
A.
promises
B.
attempts
C.
demands
D.
invests
【单选题】Since the industrial revolution, government, society, and industry have attempted to channel technological progress in useful directions. Whether it is the printing press, the cotton gin the automobil...
A.
government funding in R&D period.
B.
complete centralization of power.
C.
direct administrative interference.
D.
identifying promising technology trends.
【简答题】( )was the leading industry Since
American Independence ;
【单选题】Some people believe that since oil is scarce, the ________ of the motor industry is uncertain.
A.
terminal
B.
benefit
C.
fate
D.
estimate
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