―What a cool day! How about climbing Mount Tai?

―      . Let's ask Yang Liu to go with us.[ ]

A. Never mind                

B. Not at all   

C. Sounds great                      

D. Good luck

小儿正常体重存在着个体差异，一般可波动在

A．8%左右

B．5%左右

C．10%左右

D．15%左右

E．20%左右