有一溶液，每毫升含铁0.056mg。吸取此试液2.0mL于50mL容量瓶中定容，用1.0cm吸收池于508nm处测得吸光度A=0.400
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Conversation Two． 听材料，回答下列各题：
A. Films most exciting for them to see.
B. Film tickets suitable to buy.
C. Showing time of the films.
D. Various ways to get film tickets.
设置拦水带汇集路面表面水时，拦水带过水断面内的水面，在高速公路及一级公路上不得漫过（）。
A. 右侧车道中心线
B. 边沟
C. 左侧车道中心线
D. 右侧车道外边缘
A.To probe into the cause of natural disasters. B.To warn people of the environme
A. To probe into the cause of natural disasters.
B. To warn people of the environmental conditions.
C. To formulate effective plans to help the victims.
D. To study the influences of natural disasters.
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