Jenny found in music ________ peace which was missing in ________ world full of challenges. [    ]

A. /; the

B. /; a

C. a; the

D. the; a

注射用水和蒸馏水的检查项目主要区别是（）

A.酸碱度

B.热原

C.氯化物

D.氨

E.硫酸盐