Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments.

出自-2010年6月阅读原文

Dori began operating EFK out of her virginia home, which she then expanded to local recreation centers.

2017年12月四级真题（第二套）阅读 Section A

Many firms operating brick and mortar stores are in trouble.

2019年6月六级真题（第一套）阅读 Section B

Michael Yudell, a professor of public health at Drexel University in Philadelphia, said that modern genetics research is operating in a paradox: on the one hand, race is understood to be a useful tool to illuminate human genetic diversity, but on the othe

2016年12月六级真题（第一套）阅读 Section C

The study by Greenpeace analysed the movements of krill fishing vessels in the region and found they were increasingly operating "in the immediate vicinity of penguin colonies and whale feeding grounds" It also highlights incidents of fishing boats being

2019年12月六级真题（第二套）阅读 Section C

They learn the principles of flight and test their operating skills in the cockpit(驾驶舱) of a variety of flight simulators.

2018年高考英语北京卷 阅读理解 阅读B 原文

With such models, scientists have found out some key principles operating in food webs.

2019年高考英语天津卷 阅读理解 阅读C 原文

More than 60,000 people have purchased the PTKs since they first became available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits.

2009年考研真题（英语一）阅读理解 Section Ⅱ