题目内容

【题目】The little boy was watching a late night film at home ________, right in the middle of a thrilling scene, the television went blank.

A. which B. when C. where D. that

【答案】B

【解析】

试题分析: B考查连词,句意为:吉姆在家看一部午夜电影,看到中间一幕惊险的场景时,屏幕上突然出现一片空白。该句考查be doing...when...结构,意为正在做……就在这时(突然)……”

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【题目】

HP Photo and Document All-in-One Printers are designed for families and other home users who want a device capable of printing everything from documents, emails and web pages to rich, bright lab-quality photos—with copy and scan tools too.

Intended to be used with ink cartridges(墨盒) using only HP original electronic system. Cartridges with modified or non-HP electronic system may not work, and those that work today may not work in the future. Twice as many photos.

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Get simple Wi-Fi setup in minutes, and start printing fast.

Return & exchange information

HP.com will accept returns or exchanges for this product up to 30 days after delivery. A restocking fee may apply.

1Which statement is true of this type of printer?

A.It is a portable printer designed for home and office use.

B.It is a multi-function printer producing high-quality photos.

C.It is an easy-operation printer with a two-year free care pack.

D.It is a wireless-connected printer supported by modified cartridges.

2Which of the following words best describe its ink cartridges?

A.Cost-effective.B.Unavailable.

C.Automatic.D.Eco-friendly.

3If you order this type of printer online today, ___________.

A.you can return it without being charged.B.you can save $18.

C.you can get a care pack on discount.D.you will receive it tomorrow.

【题目】 Pigeons (鸽子) may be considered mice of the sky, but some scientists have found greater value in these urban birds: the blueprint for a new generation of flying machines.

Birds can transform the shape of their wings by fanning out their feathers or moving them closer together. Those adjustments allow birds to cut through the sky more flexibly than rigid drones (无人机). Now, using new insights into exactly how pigeons ‘joints control the spread of their wing feathers, researchers have built a robotic pigeon. This research paves the way for creating more light aircraft, says Dario Floreano, a roboticist in Switzerland not involved in the work.

“What’s really cool about this robot is that you can make adjustments in a robotic wing that you could never do when studying flight in a bird”, says David Lentink, an engineer and biologist at Stanford University. A controllable robotic pigeon solves that problem. In flight tests, Lentink’s team observed that bending only the fingers of one wing eased the robot into a banked turn-offering the first evidence that birds may sometimes use just their fingers to direct in flight. In a second study, Lentink’s group used their robotic wing design to confirm another insight into bird flight: how gaps are prevented from forming between feathers on extended wings.

This is the best set of robotic wings yet for testing how birds adjust their flight feathers to move through the air, says Tyson Hedrick, a biomechanist. But “there’s plenty of room for improvement.” For instance, a future flying robot could include a shoulder joint to investigate how waving a bird’s wings up and down influences flight, he says.

1What is the newly-found worth of pigeons?

A.They help study other species.

B.They protect other urban birds.

C.They provide proof of mice’s harm.

D.They inspire a new aircraft.

2What is Dario Floreano’s attitude to the research?

A.Negative.B.Positive.

C.Neutral.D.Critical.

3What do the underlined words “that problem” in paragraph 3 refer to?

A.Pigeons in flight can hardly be observed.

B.People can’t make adjustments in birds’ wings.

C.It is difficult for pigeons to make a banked turn.

D.Pigeons fail to control the spread of their wing feathers.

4Where does the text probably come from?

A.A travel journal.

B.A travel brochure.

C.A science fiction.

D.A science magazine.

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