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第1题

求证：函数f(z)＝x2－iy在z平面上处处不解析
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第2题

The fire that broke out in the plant during the night was still seen _____ a lot of smoke the next morning.( )(本题2.0分)
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第3题

George Washington, the first President of the U.S., is known ____ the Father of His Country.( )(本题2.0分) A、 for B
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第4题

Medical researchers reached the ____ long ago that smoking is a serious hazard to health.( )(本题2.0分) A、 decision
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