题目内容
Because aircraft move so quickly, they experience sudden ________ accelerations or “bumps” as they rapidly cross invisible bodies of air which are moving vertically at many different speeds.
查看答案
搜索结果不匹配？点我反馈
更多问题
Cabin crew and passengers on airliners have been injured when ________ around inside an aircraft cabin during extreme turbulence.
The rotating vortex-pair created by the wings of a large aircraft can ________ or even flip a smaller aircraft on the ground.
爱迪生发明的石蜡纸，起初只是普遍运用于食品，糖果的包装材料上，后来他尝试在蜡纸上刻出文字轮廓，形成一张石蜡刻字纸版，在纸版下垫上白纸，再用墨水的滚轮从刻字的石蜡纸上滚一滚，奇妙的事发生了，白纸上出现清楚的字迹。爱迪生之后又经过多次的改良试验发明了复印机。
18世纪，在苏格兰橡胶厂的麦金托什下班了，而外面正下着大雨，他没有雨具只能冒雨上下班。恰逢这天他不小心将橡胶汁沾满衣裤，怎么也擦不掉，只好穿着这身脏衣服回家。麦金托什回到家却惊喜地发现，穿在里面的衣服一点没有湿，他索性将橡胶汁涂满全身衣服。这就是世界上第一件胶布雨衣。
微信支付 
支付宝支付