单项选择题

A．Some species have been extinct since global warming.
B．Biologists have known for years declining fish stocks are connected to global warming.
C．Global warming has caused the seawater warmer.
D．It is more difficult for fish to breathe and survive in warmer oceans caused by global warming.
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单项选择题
A．He is a stranger to the stock.B．He likes the stock very much.C．He is confident of his investment.D．He is the student of the woman.
A．He is a stranger to the stock.
B．He likes the stock very much.
C．He is confident of his investment.
D．He is the student of the woman.
单项选择题
It CANNOT be inferred from the passage that______.
A．the department knows little respecting the science of global warming
B．the department is in the passive position in some cases
C．some social groups play significant roles in protecting environment
D．the department is reluctant to link heat-trapping gases with declining polar bear
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