23. Find the volume of the region E bounded by z=x2+y2,x2+y2=4 and z = 0 .
(A)
(B) 2π
(C)
(D) 4π
(E) 8π
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統計: A(0), B(0), C(0), D(1), E(0) #2348358
統計: A(0), B(0), C(0), D(1), E(0) #2348358