科技英语视听说复习提纲(完整版)

科技英语视听说复习提纲Lesson 1 The Private Life of Plants 1 1、What problems do plants have to face throughout their lives so as to survive?(1)Fight seasons (2)compete for mates (3)invade new territories 2. Are fungi plants? What do fungi produce?Fungi produce spores which are similar to seeds.3. How do the seeds of dandelions fly? A special apparatus is needed by the seeds of dandelions to fly. Each seed of the dandelion is fitted with its own individual parachute.Lesson 2 The Private Life of Plants 21. What is the begonias secret of surviving on the dim forest floor? The secret of begonia surviving on the dim forest floor lies in its leaves which undersides is red. 2. How do leaves reduce the problem of water lying on their surface? There are four ways. The first one is that the leaves are tough enough to withstand the pounding of water. The second one is that the leaves have gutters to carry away the water. The third one is leaves have pointed tips at the end so as to drain water rapidly. The last one is that leaves have the dense hairs to keep their pores free. 3. What is the dramatic solution a sensitive mimosa possesses to defend itself? One touch can make the leaves fold, another tap can make it flop to the ground. Lesson 3 Global Warming1. What are the three factors causing the collision between our civilization and the earth? (1)population (2)our way of thinking(3)the scientific and technological revolution. 2. How to balance the economy and the environment?(Open-Ended Question)3. What should we do to solve the climate crisis to secure our future or to save our planet Earth? (Open-Ended Question)Discussion 1 Big Freeze1. What might be the major cause of the Big Freeze? The major causes of the big freeze are volcanic eruptions, global warming and changes in the ocean currents. 2. Please name the five ways mentioned in the state of the planet that we care affecting lifes diversity on Earth. (1)over-harvesting (2)the introduction of alien species(3)the destruction of habitats (4)islandisation (5)pollution. Lesson 4 Journey of Life 11. What is national selection? Any trait that increases the possibility of youngster surviving will be passed on in its genes. 2. There is an enormous variety of life on the planet, how did life begin? The single-cell living things began at 3 billion years ago. The cells pulling together like jelly fish began at 670 million years ago. The animals soft bodies turned hard like snails began at around 570 million years ago. 3. Where did all life begin, and why? All the life begins in the sea .Because in the sea, the temperature hardly changes and the water can protect against the pull of gravity and the burning sun. Lesson 5 Journey of Life 21. What are the good reasons for life to get into the air? There are three reasons. The first is that wings provide animals with extra strike power. The second is that flying is fastest and most efficient way to travel. The last one is that it allows animals to find food, explore territory or escape from danger.2. Why do we say caterpillars are munching machines? Because their only purpose is to eat and grow, they can balloon to incredible 2000 times their starting weight. 3. Why do we say that the predators and prey are locked in an intense relationship? When predators find better ways to catch and kill, and preys have to improve their self-defense. That is to say, neither predators nor preys can afford to be left behind. Lesson 6Phobias1. What is phobia? Fear plays a vital part in our survival, when fear gets out of control, we call it phobias. 2. What is the percentage of people with phobias? Ten percent people with phobias. 3. Do we inherit specific phobias from our parents? No, we dont. Discussion 2 Journey to the Center of the Planet1. How does a sea turtle know its location and navigate its way around the earth? Its based on the earths magnetic field. 2. What was found at the bottom of the ocean in 1985 by some scientists? Shrimps which can live in boiling hot water and live without suns energy were found in 1985. Lesson 7 Secret of Sexes1. What are the differences between men and women? Men are more things-oriented while women are more people-oriented. 2. What are the two reasons for the marriage to end in divorce? The first reason is you are unfaithful to your spouse, the second reason is constant argue. 3. Why people say “love makes people blind”? The reward system floods with feeling good chemicals, while another part of the brain, which is used for critical thinking, switches off. Lesson 8 Great Wildlife Moments1. Why do red crabs head for the shore to spawn?Because the red crabs are unable to raise their young on land, so they have to trek several kilometers to the sea, their ancestral home. 2. How does the Aurora australis occur? The Aurora australis occurs when subatomic particles traveling through space enter the Earths magnetic field. 3. How can an eagle eat a tortoise? An eagle flies to find a favorite site, gain its height, lets the tortoise go.Lesson 9The Sun and the Moon1. Why all life on Earth owes its existence to the sun? The sun powers every natural system and sustains every plant and animal. Without the Sun, the Earth would be a barren, lifeless ball of rock. 2. What is the sun made of? Over 90% of the sun is made of hydrogen.3. What is the impact of the full moon on sea creatures and on human beings? In the ocean the full moons bright light is a mating call for sea creatures. Most women get their menstrual period at the day of full moon.Discussion 3