f(x,y)=y根号1-x2+s f(x,y)dxdy其中D=（x,y），则
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General Motors, one of the world's largest auto manufacturers, is expanding its ________ in this country.
党在过渡时期的总路线和总任务是 ______。
She had clearly no ________ of doing any work, although she was very well paid.