He saw the possibilities of ram-pressure propulsion as early as 1913, when pilots were still flying glorified wooden kites. Aware of the design's uselessness at subsonic speeds, he instead designed a ramjet-assisted flying bomb. The French military waved him off. Hungarian engineer Albert Fono...
根据最后一段"However,animals with such unusual abilities still have difficulty dealing with environmental changes caused by human activities.For example,many birds depend on stars for direction,but they get lost easily at night when city lights are kept on all night.To solve...
一般都是How are you doing,澳洲还有How are you going。据在澳洲生活的人的经验,当老外问How are u时,老外的回答是Good thank you。 美国人说 Good, I'm fine, I'm good, I'm doing ... 分享回复赞 广东工业大学吧 一个人的军队丶 个人浅谈ishow国际英语的运营模式及课程体验#2、二、三楼为备用楼...