[单项选择]Directions: This task is the same as Task 1. The questions or unfinished statements are numbered 41 to 45.

When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important that they should be able to find their way accurately. Birds find their way by the stars at night and by the sun during the day. People thought that this was impossible. Then some scientists made an experiment. They put some migrating birds(候鸟)in cages inside a planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the birds began to fly to the sides of the cage. Every time he moved it, the birds moved to a new position. Scientists discovered that they always flew toward the direction in which they would have flown if the sky had been real. This proved that they c A. Birds find their way by the stars at night and by the sun during the day. B. Birds can tell the differences between real sky and artificial sky. C. Birds can see the stars and would move when the stars change position. D. Birds always fly to the sides of the cage. 查看答案 更多"Directions: This task is the same a"的相关试题: [单项选择]Directions: This task is the same as Task 1. The questions or unfinished statements are numbered 41 to 45. When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important that they should be able to find their way accurately. Birds find their way by the stars at night and by the sun during the day. People thought that this was impossible. Then some scientists made an experiment. They put some migrating birds(候鸟)in cages inside a planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the birds began to fly to the sides of the cage. Every time he moved it, the birds moved to a new position. Scientists discovered that they always flew toward the direction in which they would have flown if the sky had been real. This proved that they c A. a clock that is built inside the bird B. a clock that tells correct time C. an exact sense of direction D. an accurate sense of time 查看答案 [单项选择]Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 to 45. Once it was considered good to keep the car engine idle a minute or two following cold stars. Today, with modern technology, the opposite is true. An engine operating under road conditions will warm up faster and run more efficiently than one that is idling. Idling just burns gas (on average, about a gallon an hour). When you have a full tank of gas, park the ear facing downhill is possible, this will prevent any gas from coming out of the tank. Parking in areas of less or no sunlight helps prevent the gas from steaming that would occur if you parked in the hot sun. Your car will stay cooler, too, and that means less gas consuming work for the air conditioner once the engine is started. St A. to tell us how expert drivers try to save gas B. to tell us how to drive a car properly C. to tell us how to make a car run smoothly D. to tell us how to make your car consume less gas 查看答案 我来回答: 提交 最新试题 ●    肺胀形成的病因病机。 ●    肺胀的常见病因（） ●    胃痛发病的关键病机是（） ●    晚期血吸虫病的临床表现有（） ●    请用150字左右的篇幅概括出给定资料的主要内容。要求：语言简练、概括全面。 ●    女，48岁，临床诊断为宫颈鳞状上皮癌Ⅰb-Ⅱa期。宫颈癌普查最常用的方法是（）。 网站地图 我要搜题网  版权所有  ©2023  湘ICP备18016427号   购买搜题卡查看答案 [会员特权] 开通VIP， 查看 全部题目答案 [会员特权] 享免全部广告特权 推荐91天 ¥36.8 ￥80元 31天 ¥20.8 ￥40元 365天 ¥88.8 ￥188元 请选择支付方式 微信支付 支付宝支付 点击支付即表示同意并接受了《购买须知》 立即支付 系统将自动为您注册账号 已有账号登录 找回账号密码 请使用微信扫码支付 订单号： 请不要关闭本页面，支付完成后请点击【支付完成】按钮 支付完成 取消支付 恭喜您，购买搜题卡成功 系统为您生成的账号密码如下： 账号 密码 重要提示：请拍照或截图保存账号密码！ 我要搜题网官网：https://www.woyaosouti.com 我已记住账号密码