单项选择题

According to the author, IPCC pictures put forward by Houghton shows ______.

A．effects of global warming
B．causes of global warming
C．examples of human damage to the environment
D．instances of natural disasters threatening human existence

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热门试题

单项选择题According to the passage, the vast majority of crimes______.

A．are very likely solved by routine investigation
B．can not be solved simply through routine investigation
C．are unlikely to be cleared up at all
D．can not be solved because the defendants are unknown

单项选择题It can be learned from this passage that______.

A．excellent detective skills are highly necessary for the police to solve crimes
B．police officers' experience in detection forms the basis for detective series on TV
C．actual solving of a crime case is more demanding than the TV series show us
D．the average police in practice rarely demonstrate or need the sophisticated detective skills shown on TV