题目内容

We to finish the work before dark, but the heavy rain held us up.

A. meant B. was meaning

C. had meant D. would mean

 

C

【解析】

试题分析: 句意:我们本打算在天黑前完成这项工作,但是大雨耽误了我们。Mean to have done 和 had meant to do 表示“本打算做但是没做成”,类似用法的词还有plan,intend等,选C

考点:考查动词时态

 

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Look, this is the first plane in the world to be created using the new technology of “3D printing”. The airplane was built using only a computer-but it can fly at a speed of 100mph and has a two-meter wingspan.

It was produced using a special nylon laser printer that builds up something layer-by-layer. The parts were made separately and attached using a “snap fit”(搭扣) technique so the aircraft could be put together without tools in minutes.

No fasteners(扣件) at all were used in the manufacture of the plane. Unmanned and electrically powered, the plane can travel in near silence and is also equipped with a small autopilot system. The special production process used is known as “laser sintering(激光烧结) “and allows the designers to create shapes and structures that would normally include costly manufacturing techniques. This technology allows a highly-tailored aircraft to be developed from your own design to first flight in days, while using traditional materials and techniques would take months. And because no tooling is required for manufacture, major changes to the shape and scale of the aircraft can be made with no extra cost.

Professor Jim Scanlon, who led the team, said, “The process allows the design team to revisit historical techniques and ideas that would have been too expensive using traditional manufacturing.” He added, “This form of structure is very firm and lightweight, but very complex. If it was manufactured traditionally it would require a large number of individually tailored parts that would have to be connected or fastened at great expense.”

The new printed plane is known as the Southampton University Laser Sintered Aircraft-or SULSA for short-and is part of a wider project using cutting-edge manufacturing techniques. The University of Southampton has been at the leading position of Unmanned Aerial Vehicle development since the early 1990s.

1. What does the passage maily talk about?

A. New Designed Airplane with New Techniques.

B. Scientists Create Aircraft with High Speed.

C. Revolut ionary Breakthrough of 3D Printer.

D. The World’s first 3-D printed Airplane, SULSA.

2. How does the 3-D printed plane fly?

A. A pilot controls it using a remote control.

B. It should be controlled by “laser sintering”.

C. It should be controlled by an autopilot system.

D. A pilot with high techniques controlled it.

3. Which of the following is NOT advantage of the plane?

A. It only requires simple and cheap tools.

B. It is manufactured in quite a short time.

C. It produces little noise while flying.

D. It needn’t extra cost if changes are made.

4. Accoding to Professor Jim Scanlon, plane manufacturers can

with their techniques.

A. copy earlier planes to study their techniques

B. connect and fasten tailor parts for real planes

C. produce firmer and lighter real planes

D. find differences by studying the traditional ones

 

The ?109 Nest Protect Smoke Alarm promises Internet alerts(警报)and an end to the low battery chirp(短而尖的叫声). Besides, it uses a voice to tell you where the fire is.

The alarm is the first UK product from Nest, which is run by iPod-inventor Tony Fadell. The company claims the device’s batteries will last for up to seven years. The device will offer a spoken warning before it sounds a major alarm. Also it will use text messages and apps on your phones to alert users to low-level risks.

The present smoke alarms constantly alert users to non-existent threats, which will make many users annoyed and finally remove their batteries altogether. “We’ve all experienced the smoke alarm going off while we’re cooking. Sometimes, we need to search for the source of that non-stop low-battery chirp at midnight,” said Fadell. “Therefore, every time a smoke alarm cries wolf, we trust it a little less, and then — in a moment of frustration — we take the batteries out to stop the beep(嘟嘟声). And that leaves us and our families at risk.”

If the Protect smoke alarms are used, they can be set up in up to ten zones, so that the clear warnings tell users where the risk has been detected.

“Safety shouldn’t be annoying,” said Matt Rogers, Nest founder and vice president of engineering. “It was unacceptable to us that one in eight houses in the UK has a non-functioning smoke alarm. These products are required by law and are supposed to keep us safe, yet people hate them. We wanted to change that.”

1.For what purpose did Nest create the Protect Smoke Alarm?

A. To predict low-level fire risks.B. To experiment with a new battery.

C. To improve present smoke alarms.D. To avoid the low-battery chirp.

2.What did Tony Fadell really want to tell us in Paragraph 3?

A. One of his cooking experiences.

B. Disadvantages of present smoke alarms.

C. His growing distrust of smoke alarms.

D. His source of annoyance to crying wolf.

3.Which of the following are the advantages of the Protect Smoke Alarm?

a. Rechargeable batteries b. A talking smoke alarm

c. Longer battery life d. Going off constantly

e. Internet connection

A. a, b, cB. c, d, eC. a, c, eD. b, c, e

4.What can we know from the last paragraph?

A. In the UK people seldom set up smoke alarms.

B. Matt Rogers didn’t like the safety requirements.

C. Non-functioning smoke alarms make people annoyed.

D. The government should pay attention to safety issues.

 

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