可用于粉末直接压片的优良稀释剂是()
A.乳糖
B.干燥淀粉
C.糊精
D.喷雾干燥乳糖
E.糖粉
参考答案:D
The teacher entered the classroom, _____.
A.with book in hand
B.book in hand
C.with book in his hand
D.book in his hand
词人()的词以个人的不幸写出人生普遍的悲苦如《虞美人》春花秋月何时了就借对往事的追怀写出了对人生无常的追问。
A、晏殊
B、冯延巳
C、苏轼
D、李煜