The authors purpose in writing this text is to argue that______.
A．the circulation of atmosphere protects the biosphere and makes life on earth possible
B．if the protective atmosphere is too damaged by human activity, all life will cease
C．life is the result of complex interdependent events of nature
D．despite the complexity and power of the atmosphere humans can affect it greatly

未分类题In paragraph 4, the word 'dog' is most similar in use to '______'.A．be addressed byB．troubleC．be associated withD．characterize

未分类题The long-term useful outcomes of the crash include______.A．increased consumer confidence in the marketplaceB．improved measures to protect investors from fraudC．clearer knowledge of the future of the marketD．improvement in the management of global businesses

未分类题In paragraph 2, 'the event still colors the play of cautious investors' means that______.A．the event has been forgotten by all but the most cautious investorsB．the event has scared many people away from investingC．the event still hurts the market todayD．the event still influences the decisions of investors today

未分类题The authors attitude towards the long-term influence of the oil spillage is one of______.A．optimisticB．uncertaintyC．concernD．indignation

未分类题The authors attitude towards early screening for lung cancer is______.A．satisfactoryB．disappointedC．criticalD．objective