题目

有一种鸟，其习性是在远离人类活动的区域生活。例如有一片原始森林(如图2一6甲)，在周围没有人类活动时，这种鸟可以在该森林中自由自在地生活。有关部门为发展生态旅游，在该森林内开辟一条如图Z一6乙所示的观光小路。对这一行为可能造成的后果，从生态角度看，以下说法正确的是( ) A . 这种鸟的活动范围将更大，数量会更多 B . 因为小路宽度很小，该鸟的生存空间没有变化 C . 该鸟的生存空间将缩小，可能威胁到它的生存 D . 旅游开发有利 Now satellites(卫星)are helping to forecast(预报)the weather. They are in space and they can reach any part of the world.The satellites take pictures of the atmosphere(大气), because this is where the weather forms(形成)。They send these pictures to the weather station. So meteorologists(气象专家)can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change. Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures,the meteor- ologists compare(比较)them with earlier ones. Peerhaps they may find that the clouds have changed during the last few hours .This may mean the weather on the ground may soon change,too. In their next weather forecast, the meteorologists can say this. So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for 3 or 5 days. Soon,perhaps , they may be ablet to forecast the weather for a week or more ahead(提前) 1.Satellites travel__________. A in space           B in the atmosphere C above the ground    D above space 2.Why do we use the weather satellites to take pictures of the atmosphere? Because___________. A the weather satellites can do it easily B clouds form there C the weather forms there D the pictures can forecast the weather 3. Meteorologists forecast the weather________. A when they have received satellite pictures B after they have compared new satellite pictures with earlier ones C before they receive satellite pictures D while they study satellite pictures 4.Maybe we’ll soon be able to forecast the weather for _______. A one day   B two days  C five days   D seven days or even longer 5.The main idea of this passage is that satellite are now used    in______. A taking pictures of the atmosphere B receiving pictures of the atmosphere C doing other work in many ways D weather forecasting