人体能自动摆脱的最大电流称为（）电流
A.感知
B.摆脱
C.致命
参考答案：B
DNA的两条链上排列顺序稳定不变的是 [ ]
A．4种脱氧核苷酸
B．脱氧核糖和磷酸
C．碱基对
D．4种核糖核苷酸
_______we were having at the party!
A．What wonderful time
B．What a wonderful time
C．How wonderful time
D．How a wonderful time
