问题
单项选择题
以下不是DNA的组成（）
A、脱氧核糖
B、磷酸二脂键
C、胸腺嘧啶
D、尿嘧啶
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
以下不是DNA的组成（）
A、脱氧核糖
B、磷酸二脂键
C、胸腺嘧啶
D、尿嘧啶
参考答案：D
Hi, boys and girls! I’m Kathy.Let me _小题1:__you something about my family.There 小题2: three people in my family------my father, my mother, and I.My father is a 小题3: .And he works in a bank.He thinks his job is 小题4: boring.He wants 小题5: a policeman.He enjoys __小题6:__ TV after dinner.My mother is a teacher.She 小题7: in a middle school.She thinks her job is very 小题8:.She likes her students very much.She works hard and often comes back home late.Look, many students are on the playground.Some are walking, __小题9:_are playing games..In her free time(空闲时间), she likes writing stories 小题10: a magazine.I study at a middle school.I also want to be a teacher when I grow up.
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