The lucky fans will be picked out________ rather than  chosen  beforehand  to perform with the

singer during the party.    [ ]

A. by accident        

B. on earth    

C. come across        

D. come on

成人血清钠检测值为125mmol/L，估计每公斤体重缺氯化钠的量为

A．0.80～1.00g
B．130～1.50g
C．1.05～1.25g
D．0.25～0.45g
E．0.50～0.75g