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Why do human beings still risk their lives under ground and doing one of the dirtiest and most dangerous jobs in the world? It is an increasingly urgent question, given the recent mining accidents in Sago, W. Va and Huntington, Utah. A small group of engineers and robotics experts look forward to a day in the not-too-distant future when robots and other technology do most of the dangerous mining work.

Robotic technology, in particular, holds much promise, McAteer says, especially when it comes to mapping mines and rescuing trapped miners — the special operations of the mining industry.

One of the first mining robots was developed five years ago at Carnegie Mellon University’s Robotics Institute. It was called Groundhog. It used lasers(激光器) to “see” in dark tunnels and map abandoned mines—some of the most dangerous work in the business.

The latest design is called Cave Crawler. It’s a bit smaller than Groundhog, and even more advanced. It can take photos and videos and has more sensors that can detect the presence of dangerous gases. Incredibly, the robot has a real sense of logic. If it comes across an obstacle it gets momentarily confused. It has to think about what to do and where to go next. Sometimes it throws a fit just like a real person.

The greatest problem, though, is cost. The money of the earliest research project was provided by the government, but that money had dried up, and it’s not clear where future money will come from. Partly for that reason, and partly because of advances in safety, mining is not nearly as dangerous as it was in the past. Since 1990, fatalities(致命性) have declined by 67% and injuries by 51% , according to the National Mining Association.

Some experts predict that robots in mines will serve much of the same function that they do in the automotive industry. The robots do the most boring and dangerous jobs,but won’t get rid of the need for human workers.

1.The latest robot is more advanced than Groundhog, mainly because ________.

A. it can map abandoned mines

B. it has a real sense of logic

C. it can see in the dark tunnels

D. it’s smaller than Groundhog

2.The underlined phrase “throws a fit” in paragraph 4 probably means“________”.

A. gets sickB. gets angry

C. becomes hungryD. becomes cheerful

3.We can infer from the last paragraph that ________.

A. the mine robots will have a very bright future

B. robots in mines will serve much in the automotive industry

C. there will be no need for human workers in mines

D. robots in mines only do some simple jobs now

4.We can infer from the text that ________.

A. robots cannot do dangerous work in dark areas

B. the mining robots do most of the mining work at present

C. groundhog can discover the presence of dangerous gases

D. experts are trying to make robots help miners with dangerous work

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How to Develop Courage by Overcoming Daily Fears

Sometimes when thinking of courage, we think it only applies to rare and uncommon situations. Yet our ordinary lives can also be full of courage, even if we are not facing the end of a gun, a wild animal or a dangerous criminal. Courage doesn't just mean doing heroic acts. 1. In fact, where there is fear on a daily basis, there are opportunities for you to show your courage. Here are some suggestions to develop courage by overcoming daily fears.

● Recognizing your fears.

By realizing that you're fearful, you are more likely to get to the bottom of what your fear is. 2. You might come to understand that you're afraid of failing or taking chances. You may be fearful simply because you don't have confidence in yourself. The key is not to dwell on your fear, but rather to understand what it is what you're worried about.

● Ask yourself what is the worst that can happen.

If you hesitate to take action, ask yourself this: What's the worst that can happen? Then prepare to accept it. Then go on to improve on the worst. Is failure the worst thing that can happen? No, absolutely not. 3. Doing nothing is actually the worst thing that can happen. When you take no action, you are assured of getting nowhere.

● Take action.

Courage comes from taking action. 4. You need to act to overcome your fear. Your action may put you into discomfort, but you have to just do it. And your action can prevent you from being stuck.

●5.

To build up your confidence, you need to do the same thing over and over again. Soon you will discover that less courage is needed because you have already gained mastery. You are able to move decisively forward.

A. Share your fears with others.

B. Practice, practice and practice.

C. So you are already in a comfort zone.

D. You cannot think courage comes just in one day.

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根据对话内容,从对话后的选项中选出能填入空白处的最佳选项 。选项中有两项为多余选项.

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5.

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