题目内容
Clear air turbulence is impossible to detect either with the naked eye or with ________ radar, meaning that it is difficult to avoid.
查看答案
搜索结果不匹配？点我反馈
更多问题
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.
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。
微信支付 
支付宝支付