【推荐1】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Aeronautics (航空学) specialists from the University of South Australia spent months studying the dragonfly’s flight, creating 3D models from digital images,     1     (build) a winged drone (无人机). Study leader Javaan Chahl believes that winged drones     2    (base) on the dragonfly’s shape and movement will simply be     3    (flexible) and energy efficient, compared to the previous ones.

Chahl’s team used a special photography technique to classify     4     wing shapes of 75 different dragonfly species from museum collections. Their wings are long, light and hard. Plus, their long bodies give them excellent stability and balance, making it possible for winged drones to deliver awkward loads     5     carry out long observation missions.

Investigating the way that dragonflies remain stable during flight actually     6    (reveal) the techniques they use to get themselves out of tricky situations. Dragonflies are found to be able to perform upside-down backflips to regain balance and normal flight, when they find themselves upside down mid-air. This special skill can even     7    (perform) while dragonflies are unconscious, meaning it is a passive stability mechanism similar in concept     8     planes that are designed to sail to     9     (safe) with their engines turned off. Engineers are looking to copy dragonfly wings to create safer ones,     10     can right themselves.

【推荐2】Read the passage and fill in the blanks with proper words or the proper forms of the given words and phrase.

An augmented-reality (增强现实的) helmet       1     gives cyclists a 360-degree view of the road could help prevent accidents, according to the designers.

Unlike cars, bicycles don’t come with rear-view mirrors (后视镜), which is       2     British product design firm DCA created the Optic helmet.

The visor (面甲) can display potential dangers, such as an overtaking vehicle, and warn the riders of them by combining data from the cameras and ultrasonic (超声波的) sensors on the front and back of the helmet.     3    , the Optic helmet can overlay GPS navigation (导航) information for riders     4     want to track their performance.

“There have been times     5     I’ve been cycling to work where there’s been some obstacle in the road or a crossing and I’ve had to look over my shoulder while signalling,” Richard Price, an industrial designer at DCA, told Live Science. “When you do that, often something suddenly     6     (appear) in front of you and there’s been quite a few times when I’ve had to stop suddenly.”

The Optic helmet will be able to connect to a smartphone via Bluetooth, to allow maps and routing information to be uploaded, but actual navigation will     7     (carry out) by the helmet using its onboard GPS unit, according to DCA. It can be controlled     8     by a touchpad next to the visor or by using gestures picked up by the front camera.

Users can customize     9     is shown on the visor to suit their needs. The electronics are in the top of the helmet, which is the area least likely     10     (shock) during a crash. Since the designs were made public, the design company has received plenty of positive feedback from cyclists and companies producing equipment for the sports club.