The space animal theory would seem to indicate that_______.
A.living creatures are extremely adaptable
B.life in space is impossible for man
C.the fittest creatures always survive
D.life cannot exist in the depth of the sea
第7题
甲乙两人的年龄和是63岁,当甲是乙现在年龄的1/2时,乙当时的年龄是甲现在的年龄,乙比甲大几岁?
A.10
B.9
C.8
D.7
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