题干
给下列句子选择相应的图片。
⑴My father is practising English.____ A. 
⑵I'm going to study Geography in middle school.____ B. 
⑶He is going to ride his bike to school.____ C. 
⑷My friend Sam is going back to the UK.____ D. 
⑸It's time to have lunch.____ E. 
答案(点此获取答案解析）
C,E,A,B,D
双链在复制时解旋，这时下列哪一对碱基从氢键连接处分开
