用于注射用灭菌粉末的溶剂或注射液的稀释剂（）
A.纯化水
B.注射用水
C.灭菌蒸馏水
D.灭菌注射用水
E.制药用水
参考答案：D
About ____of the students in Grade Nine this year were born in the_____.[ ]
A. three five; 1996.
B. three fifths; 1990s
C. third fifth; 1997.
D. third fifths; 1990s
委托合同只能是有偿合同。（）
