问题
选择题
“一母生九子，九子各不同”这句俗语说的是生物界普遍存在的（ ）
A．遗传现象
B．繁殖现象
C．变异现象
D．进化现象
答案
答案：C
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“一母生九子，九子各不同”这句俗语说的是生物界普遍存在的（ ）
A．遗传现象
B．繁殖现象
C．变异现象
D．进化现象
答案：C
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| Mike always loves ships. When he was 1 , he said,"l'm going into the army. "But his eyes were not 2 ,and he could not get in. Then he said,"l'm going to buy a small 3 ,and I'm going to go around the world. "But boats 4 very expensive,and Mike did not have 5 money. But last summer Mike found a swimmg club(俱乐部)near 6 house.The lessons did not cost very much,and Mike began going to the club at the weekends and 7 Now he is a good swimmer. Last week a little boy said to him,"You are a very good swimmer. How did you leam to swim 8 "Mike said and he smiled,"Whenever I'm in the water,l say to 9 ,There are dangerous fishes in this area(地区) !' Then I'm very 10 ,and I try to swim fast. "
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