20. The flux of the vector field 
= (siny+x3,3yz2 +e,3zy2) through the surface x2+y2+z2 = 1, z ≥ 0, where the surface is equipped with the upward normal, is__(25)__.
阿摩線上測驗
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20. The flux of the vector field = (siny+x3,3yz2 +e,3zy2) through the surface x2+y2+z2 = 1, z ≥ 0, where the surface is equipped with the upward normal, is__(25)__.