Unit 6 Survival Understanding ideas 课件-2023-2024学年高二英语外研版（2019）选择性必修第二册

Unit 6 Survival Understanding ideas 1 Look at the pictures and answers the questions 1. What does each picture show? It shows that an earthquake has happened. The road is cut off. It tells us that a disease has broken out and is probably spreading. The ship is sinking. It shows us a dense jungle. We can see an astronaut in space. It shows us a severe drought. 2. What difficulties would people have surviving in these situations? People would find it difficult to leave the area to find safety, or to receive supplies such as food, water, medicines and fuel. Power and communications may have been cut off by the earthquake. There is a risk of further quakes via an aftershock. People may face difficulties such as quarantine, shortage of hospital services and panic-buying of essential medicines, food or other supplies. There may be misinformation and panic. 3 2. What difficulties would people have surviving in these situations? People who are unable to escape the ship on a lifeboat face the immediate dangers of drowning or of dying from exposure. Those who do escape on a lifeboat need to ration their food and water, and hope for rescue as soon as possible. People would find it difficult to travel and navigate. It would also be difficult to find food and water. Wild animals and venomous insects are also potential problems. 4 2. What difficulties would people have surviving in these situations? Space is an extreme environment for human beings. They face danger from extreme temperatures, low pressures and radiation. They must carry everything they need with them, even air. The lack of gravity makes simple actions such as eating, drinking, moving and even sleeping difficult. Anyone who spends too long in a zero-gravity environment risks losing bone and muscle mass. 5 2. What difficulties would people have surviving in these situations? Without water, people and livestock face death within a short period of time. In addition to water shortages, drought causes crop failure, so