三个数都是18，它们的和是请选择CAB*D-d6`0k0i;h7^([1^4G+I8{。/@,o1e*S(O9N'e(V7h0b0o)h
A.60 B.54 C.52/@,o1e*S(O9N'e(V7h0b0o)h
90连续减去两个18，差是请选择BCA'w(]6T.J;g1x(g1L9D。/@,o1e*S(O9N'e(V7h0b0o)h
A.44 B.54 C.64/@,o1e*S(O9N'e(V7h0b0o)h