Moments earlier, Guarin and his children had hiked to Hermit Falls in Angeles National Forest, one of the most popular waterfalls in the Los Angeles area. Soon after they arrived, they saw a man dislocate his shoulder when he jumped into the rock pool at the base of Hermit Falls. Less than a minute later, another man jumped and appeared to break both his legs. Guarin said the cliff jumpers' intentions were obvious. They wanted to get a video of themselves and post it to social media.

A thirst among hikers, often inexperienced and under-prepared, to collect "likes" and shares on Instagram and other social media sites has led to a significant increase in rescue missions by first responders.

The Los Angeles County Sheriff' s Department's Search and Rescue teams conducted 681 missions in 2017, the largest number in five years. It' s a 38% increase from the 491 rescues they did in 2013.

The teams' leaders say the single largest factor for that increase is people posting videos of extreme activities online. Then, without any thought about the difficulty, others try to recreate their own 15-second version of glory.

On Instagram, posts from visitors venturing to waterfalls and swimming holes in Angeles National Forest and other recreation areas show hikers changed into models, striking seemingly the same poses in the same places.

We shouldn't discourage people from enjoying the outdoors. But many accidents are avoidable and happen either when people go off trail or ignore official warnings about an area being closed and visit anyway.

Guarin still thinks about the two men he watched hitching helicopter rides to a hospital. "You get concerned about what people are willing to do - to not have fun. It's risking everything for no reason. "

Well, there are the "likes".

【1】What happened to the two jumpers'?

A.They both got badly injured.

B.They were trapped in a rock pool.

C.They were rescued by the Guarins.

D.They were caught in an air crash.

【2】What is the main reason for the increase in the number of rescues?

A.Hikers are inexperienced and under-prepared.

B.Helicopters are readily available in more areas.

C.Travelers go off trail or ignore official warnings.

D.More people share their extreme activities online.

【3】What do the figures imply in paragraph 4?

A.More social rescues are timely and effective.

B.More attention is paid from the social media.

C.More people raise the awareness of self-defense.

D.More public resources are obviously being occupied.

【4】What does Guarin think of the jumpers' action?

A.It is not a wise thing to do.

B.It is their own version of glory

C.Watching it online is a lot of fun.

D.Getting "likes" makes it worthwhile.

【答案】

【1】A

【2】D

【3】D

【4】A

【解析】

这是一篇说明文。越来越多的人为了得到关注而在社交媒体上传自己的极限活动视频，由于不专业而在做极限活动时出现了很多事故，不仅占用公共搜救资源，也是一种很冒险的行为。

【1】

细节理解题。根据第二段中“Soon after they arrived, they saw a man dislocate his shoulder when he jumped into the rock pool at the base of Hermit Falls. Less than a minute later, another man jumped and appeared to break both his legs.(他们到达之后，看见一个人跳向瀑布底部的潮水潭时肩膀脱臼。不到一分钟后，另一个人也跳了，双腿骨折。)”可知，这两人都受伤严重。故选A项。

【2】

细节理解题。根据第五段第一句“The teams' leaders say the single largest factor for that increase is people posting videos of extreme activities online.”可知，救援数量增长的唯一最大原因是人们在网上上传极限活动的视频。故选D项。

【3】

推理判断题。根据第四段内容“The Los Angeles County Sheriff' s Department's Search and Rescue teams conducted 681 missions in 2017, the largest number in five years. It' s a 38% increase from the 491 rescues they did in 2013.”可知，洛杉矶县警局搜救队在2017年实施了681次救援，是五年内数量最大的。比2013年491次救援增加了38%。由此可推测，这占用了更多的公共资源。故选D项。

【4】

推理判断题。根据倒数第二段Guarin 说的话“You get concerned about what people are willing to do - to not have fun. It's risking everything for no reason.”可知，他认为跳跃者毫无理由地拿一切冒险，这种行为是不明智的。故选A项。