印度数学的发展可以划分为三个重要时期，首先是雅利安人入侵以前的达罗毗荼人时期(约公元前3000一前1400，史称河谷文化)、吠陀时期(约公元前10世纪一前3世纪)、悉檀多时期(5世纪一12世纪).。()
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According to the first paragraph, Tony Abbott seems likely to______.
A. cut down carbon emission
B. reduce taxes for his people
C. abolish outdated laws and rules
D. evade environmental regulations
The authors attitude towards most countries new environmental laws seems to be______.
A. positive
B. biased
C. doubtful
D. impartial
【B2】
A. adapt to
B. provide for
C. compete with
D. decide on
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