细菌普通菌毛的功能（） A.与细菌的侵袭力有关 B.与细菌的分裂有关 C.与细菌的D
题型：单项选择题 A1/A2型题
问题：
细菌普通菌毛的功能（）
A.与细菌的侵袭力有关
B.与细菌的分裂有关
C.与细菌的DNA传递有关
D.与细菌的变异有关
E.与细菌的代谢有关
题型：单项选择题 A1/A2型题
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It was a very cold morning. Some children  were 1 on the ice. It was snowing 2 but they enjoyedthemselves. Mike, the tallest boy, skated fast and he 3 that there was a hole 4 the ice. He 5  into the water. The other children called out loudly for help. 6 at that moment a young worker 7 by and heard them. He put his bike by the side of the river 8 r  an to them. When he pulled Mike out of the 9 , he was all wet. Then he sent Mike to a hospital. 10 that the young man hurried to work. | |||
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