第六章单元测试
  1. The arc length of the curve , is( )。

  2. A: B: C: D:
    答案:
  3. The area bounded by is ( )。

  4. A: B: C: D:
  5. The volume of the solid obtained by revolving the region bounded by the x-axis and the y-axis about the x-axis is( )。

  6. A:1 B:0.5 C: D:
  7. The area bounded by is ( )。

  8. A: B: C: D:
  9. The volume of the solid generated by revolving about is( )。

  10. A: B: C: D:

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