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Until men invented ways of staying underwater for more than a few minutes, the wonders of the world below the surface of the sea were almost unknown. The main problem, of course, lies in air. How could air be provided to swimmers below the surface of the sea Pictures made about 2,900 years ago in Asia show men swimming under the surface with air bags tied to their bodies. A pipe from the bag carried air into the swimmer’s mouth. But little progress was achieved in the invention of diving devices until about 1490, when the famous Italian painter, Leonardo da Vinci, designed a complete diving suit. In 1680, an Italian professor invented a large air bag with a glass window to be worn over the diver’s head. To "clean" the air a breathing pipe went from the air bag, through another bag to remove moisture, and then again to the la A. gave later inventors the idea of moving air around in diving devices. B. can "clean" the air. C. was used to remove moisture. D. was nothing but a plan. 查看答案 更多"{{B}}Text 3{{/B}} Until"的相关试题: [单项选择]{{B}}Text 3{{/B}} Until men invented ways of staying underwater for more than a few minutes, the wonders of the world below the surface of the sea were almost unknown. The main problem, of course, lies in air. How could air be provided to swimmers below the surface of the sea Pictures made about 2,900 years ago in Asia show men swimming under the surface with air bags tied to their bodies. A pipe from the bag carried air into the swimmer’s mouth. But little progress was achieved in the invention of diving devices until about 1490, when the famous Italian painter, Leonardo da Vinci, designed a complete diving suit. In 1680, an Italian professor invented a large air bag with a glass window to be worn over the diver’s head. To "clean" the air a breathing pipe went from the air bag, through another bag to remove moisture, and then again to the la A. an Italian professor invented a large air bag. B. men invented the best diving devices. C. an Italian painter designed a complete diving suit. D. an air bag. 查看答案 [单项选择] Until men invented ways of staying underwater for more than a few minutes, the wonders of the world below the surface of the sea were almost unknown. The main problem, of course, lies in air. How could air be provided to swimmers below the surface’ of the sea Pictures made about 2,900 years ago in Asia show men swimming under the surface with air bags tied to their bodies. A pipe from the bag carried air into the swimmer’s mouth. But little progress was achieved in the invention of diving devices until about 1490, when the famous Italian painter, Leonardo da Vinci, designed a complete diving suit. In 1680, an Italian professor invented a large air bag with a glass window to be worn over the diver’s head. To "clean" the air a breathing pipe went from. the air bag, through another bag to remove moisture, and then again to the large air bag. The plan did not work, but it gave later inventors the idea of moving air around in diving devices. A. an Italian professor invented a large air bag B. men invented the best diving devices C. an Italian painter designed a complete diving suit D. an air bag 查看答案 我来回答: 提交 最新试题 ●    [判断题]人民法院经过审理,行政行为超越职权的,判决撤销或者部分撤销,并可以判决被告重新作出行政行为 ●    [单选题]《安全生产法》第八十条 县级以上地方各级人民政府应当组织有关部门制定本行政区域内生产安全事 ●    [单选题]马克思关于人的全面发展学说指出，造就全面发展的人的唯一方法是（）。 ●    [多选题]党的十七大报告指出，深入贯彻落实科学发展观，必须坚持（　　）。 ●    [多选题]党的十九大报告明确指出，中国特色社会主义进入新时代，我国社会主要矛盾已经转化为人民日益增长 ●    [多选题]党的十九大报告指出：中国特色社会主义进入新时代，我国社会主要矛盾已经转化为人民日益增长的美 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