使用不纯的单色光时，测得的吸光度（）
A.有正误差
B.有负误差
C.无误差
D.误差不定
参考答案：B
将对话补充完整。
A: Let's a restaurant to eat dumplings.
B: No. I want to a dress.
A: I'm tired. I don't want to buy a dress.
B: Well, do you want to do?
A: I want to a book.
广州工亡赔偿项目包括哪些？
