如图,A、B、C是⊙O上的三点,已知∠O=60°,则∠C=( )
A:20°
B:25°
C:30°
D:45°
食用碘盐可预防粗脖子病,市售加碘盐包装袋上注明:每千克含碘20-50mg,这里标明的含碘量是指( )
- Would you like some coffee?
- Yes, and please get me some milk. I prefer coffee __________ milk.
近代中国,一批爱国知识分子创办刊物、著书立说,宣传进步思想,在《新青年》杂志上提出的著名口号应该是( )