A . There was no air or water on Jupiter.B . Life was not possible in outer space.C . The mystery of life could not be resolved.
(2)
A . It has a number of active volcanoes(火山).B . It has an atmosphere like the earth's.C . It has a large ocean under its surface.D . It has deep caves several miles long.
(3)
A . Light is not an essential element to it.B . Life can form in very hot temperatures.C . Every form of life undergoes(经历) evolution.D . Oxygen is not needed for some life forms.