问题
单项选择题 A1/A2型题
病毒的增殖方式是（）
A.复制
B.二分裂
C.对数增殖
D.减数分裂
E.芽生
答案
参考答案：A
解析：病毒以复制的方式繁殖后代，周期为吸附-穿入-脱壳-生物合成-组装与释放。
搜题请搜索小程序“爱下问搜题”
病毒的增殖方式是（）
A.复制
B.二分裂
C.对数增殖
D.减数分裂
E.芽生
参考答案：A
解析：病毒以复制的方式繁殖后代，周期为吸附-穿入-脱壳-生物合成-组装与释放。
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| How do you spend your summer holidays? Do you have a 1 or stay at home? 2 good use of the summer holidays is very important for students. When I was young, I always spent my holidays 3 the country where my grandparents lived. The blue sky and the clean river gave me a refreshing (令人精神振作的) 4 from living in the city. Sometimes I went swimming or fishing and sometimes I just enjoyed 5 on the grassy field. Sometimes I 6 the villagers and had a talk with them. This 7 of village life broadened my views and strengthened my health. The younger generation living in the city has limited living 8 and how to spend the holidays 9 a troublesome problem. Many children spend their holidays entirely at home in tall buildings, 10 they get up late, play electronic 11 and watch TV. They seldom think of 12 with the housework or even leaving the room. After two or three 13 of this sort of holidays, they are 14 both in mind and body. A lack of discipline(纪律) leads them to 15 bad habits. Holiday is not a time for students to just lie around"resting". It is a good 16 for parents to ask their children 17 household duties. Some schools also 18 students to take part in many kinds of activities such as 19 volunteers working for people like guiding tourists. Such experiences give students a wider knowledge of the 20 they live in. | ||||
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