题目内容：

    Two years ago, aerospace manufacturer SpaceX shocked the world by landing its reusable booster (助推器) engine — the biggest and most costly part of the rocket used to power spacecraft into low orbit — on an autonomous drone ship in the Atlantic Ocean. Now, California-based startup Rocket Lab, has come up with an even more courageous idea: using parachutes and helicopters to capture the returning booster, or first stage as it is often called, in the air!

Rocket Lab’s decision to avoid the propulsive or vertical (垂直的) landing used by SpaceX comes from its business model to keep its Electron rockets small and cost-effective. Standing just 57 feet tall, they are designed to deliver smaller payloads (有效载重) of about 500 pounds for only $5 million a launch. In contrast, the SpaceX Falcon 9 rocket measuring 229 feet tall can lift up to 50,000 pounds, costs about $62 million a mission. “We’re not in the business of building medium-sized launch vehicles but small ones for customers to get on orbit frequently.” said Rocket Lab CEO Peter Beck.

Similar to other rockets, the Electron divides into two once it reaches outer space. While the top part, carrying the load, continues on to its final destination, the booster engine falls back to Earth The company intends to fix a ballute — a parachute-like braking device — to quickly slow down the booster's supersonic speed (超声速) upon its return into the atmosphere. Once it slows down to a reasonable pace, a helicopter will grab the rocket from midair and put it onto an awaiting ship to transport to the company's headquarters. Beck said: “The grand goal here is that if we can capture the vehicle in wonderful condition, in theory, we should be able to put it back on the pad, charge the batteries up, and go again.”

The idea, still in the concept stage, will become one step closer to becoming a reality during Electron’s next launch, scheduled for sometime in 3 years, “Engineers will carefully monitor the first stage as it returns, testing its ability to guide its landing with the best way to slow down its speed,” said Beck.

1.We can infer from the first two paragraphs that ___________.

A.with a height of 229 feet, the Space X Falcon 9 rocket can deliver a load of 50,000 tons

B.small launch vehicles are designed by Rocket Lab to make its boosters economical

C.Space X once successfully captured its rocket before it landed on a ship in the Atlantic Ocean

D.an autonomous drone ship is used by Rocket Lab to transport the first stage

2.What distinguishes the Electron from other rockets?

A.It will be equipped with a ballute to reduce its landing speed.

B.Its booster engine falls back to the earth with the load.

C.It divides into two the instant it enters outer space.

D.It is loaded on a helicopter heading for the company’s headquarters.

3.What will Rocket Lab’s following research focus on?

A.How to capture the booster engine without damaging its function.

B.When to slow down the first stage as it returns.

C.How to cut the cost of each launch mission by calculation.

D.How to make its rockets smaller and more reusable.

4.In which column can you find this article in a piece of newspaper?

A.Books & Art. B.Business.

C.Science Fiction. D.Technology.