题目内容：

    A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components,” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.

They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers’ fields or on the battlefield. “Basically, it should be able to take off, land and fly around,” he said.

Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”

1.Which of the following statements was the difficulty engineers met while making the robotic fly?

A.They did not have sufficient fund.

B.No ready-made components were available.

C.There was no model in their mind.

D.It was hard for them to assemble the components.

2.What can be inferred from paragraphs 3 and 4?

A.The robotic fly has been put into wide application.

B.The robotic fly consists of a flight device and a control system.

C.Information from many sources can be collected by the robotic fly.

D.The robotic fly can just fly in limited areas at present.

3.Which of the following can be learned from the passage?

A.Wood’s design can replace animals in some experiments.

B.Animals are not allowed in biological experiments.

C.The robotic flyer is designed to learn about insects.

D.There used to be few ways to study how insects fly.

4.Which of the following might be the best title of the passage?

A.The Development of Robotic Fly

B.Robotic Fly Promotes Engineering Science

C.Harvard’s Efforts in Making Robotic Fly

D.Robotic Fly Imitates Real Life Insect