填空题 ITAIPU DAM: Vital statistics Location: Brazil and Paraguay Completion date: (21) Purpose: Hydro-electric power Cost: (22) Type: Gravity Material: (23) length: 7.8 kilometers (24) : 196 meters (25) 1.02 trillion cubic feet There are two problems caused by the construction of the dam. One is that the water from the dam (26) which spread diseases among the people. The other is that the reservoir destroyed the rainforest, which consequently caused the death of (27) and other forest creatures. Question 28-30 Label the diagram, and write one word for each blank.