题目内容
The skin on her hands was hard and ________.
A. rough B. relevant C. sharp D. firm
A
It was 4 o'clock in the morning，when I received the phone call．
“This is the emergency room calling and your son was just 36 in with severe burns on his face，neck and arms．We have called for a(n) 37 and are going to fly him to the burn unit in Seattle．”Seattle was 350 miles from his college，so we knew immediately this was 38 . The doctor described the 39 ，which caused the burns．At 6 am，our son and his friends decided to barbecue hamburgers in the courtyard of their apartment．When they 40 the charcoal(木炭)，it burst into flames because they had sprayed too much gasoline (petrol)．The flames 41 my son’s shirt tail and shot from his waist to well over his head．
42 ，one of the boys was quick—minded，grasped my son，and 43 him on the grass．While it saved his life，it was not 44 to save him from severe burns and the terrible scars．
After he 45 from the treatments，the doctors told him they would not do plastic surgery(整容)for 6 months 46 it takes that long for the skin to stop shrinking and wrinkling．So，he had to return to college with scars typical of severe burns．
When I was a child , my mother told my sister，who had a 10-inch very 47 scar on her arm，“Nancy，if you ignore the scar，other people will ignore it．It does not mean they will not 48 it，but it means it will not matter to them if it does not matter to you．”I 49 this wisdom on to my son．He took my advice to 50 and returned to school with his head held high--glad he was alive．
By the end of the six—month waiting period，he decided that the scars did not 51 ．So he made the 52 to give up any plastic surgery .We all have “scars” that we believe 53 people to keep away from us．And we spend a lot of time thinking that if only we looked differently，or dressed differently，people would like us better. But you see，people will only judge you by your looks，or your clothes，if you are judging yourself by these same 54 standards．Put your imperfections out of your mind and concentrate on what you value 55 yourself，and your beauty will shine through．
| A. | brought | B. | given | C. | turned | D. | showed | |
| A. | doctor | B. | hospital | C. | aircraft | D. | ambulance | |
| A. | serious | B. | terrible | C. | dangerous | D. | important | |
| A. | event | B. | process | C. | reason | D. | accident | |
| A. | got | B. | lit | C. | burned | D. | moved | |
| A. | took | B. | held | C. | caught | D. | attracted | |
| A. | Fortunately | B. | Surprisingly | C. | Happily | D. | Slowly | |
| A. | pushed | B. | threw | C. | dropped | D. | rolled | |
| A. | shape | B. | place | C. | fact | D. | time | |
| A. | benefited | B. | recovered | C. | suffered | D. | relaxed | |
| A. | if | B. | while | C. | because | D. | although | |
| A. | normal | B. | violent | C. | obvious | D. | popular | |
| A. | mention | B. | notice | C. | 1augh | D. | hide | |
| A. | sent | B. | kept | C. | handed | D. | passed | |
| A. | heart | B. | life | C. | practice | D. | considerate | |
| A. | grow | B. | matter | C. | exist | D. | appear | |
| A. | mistake | B. | effort | C. | decision | D. | request | |
| A. | invite | B. | cause | C. | allow | D. | remind | |
| A. | false | B. | strict | C. | moral | D. | general | |
| A. | by | B. | over | C. | beyond | D. | within |
Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the body—and the body from them—until they can be released at just the right spot. There are lots of ways to trigger (引发) this release, including changing temperature, acidity, and so on. But triggers can come with their own risks—burns, for example. Now, researchers in California have designed what could be a harmless trigger to date: shining near-infrared light (NIR, 近红外线) on the drug in the capsule.
The idea of using light to liberate the drug in the capsule isn’t new. Researchers around the globe have developed polymers (聚合物) and other materials that begin to break down when they absorb either ultraviolet (UV, 紫外线) or visible light. But tissues also readily absorb UV and visible light, which means the drug release can be triggered only near the skin, where the light can reach the capsule. NIR light largely passes through tissues, so researchers have tried to use it as a trigger. But few compounds (化合物) absorb NIR well and go through chemical changes.
That changed last year when Adah Almutairi, a chemist at the University of California, San Diego, reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIR-absorbing group called o-nitrobenzyl (ONB). When they catch the light, ONB groups fall off the polymer, leading to its breakdown. But ONB is only a so-so NIR absorber, and it could be poisonous to cells when it separates from the polymer.
So Almutairi and her colleagues reported creating a new material for capsules that’s even better.This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的) components that make it highly unstable in its polymeric form, a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols, they cap each reactive component with a light-absorbing compound called Bhc. When the Bhcs absorb NIR light, the reactive groups are exposed and break the long polymer into two short chains. Shining additional light continues this breakdown, potentially releasing any drugs in the capsule. What’s more, Almutairi says, Bhc is 10 times better at absorbing NIR than is ONB and is not poisonous to cells.
【小题1】According to the passage, which of the following could be the best trigger?
| A．Temperature change. | B．NIR light. | C．Acidity change. | D．UV light. |
| A．It breaks down when it absorbs NIR light. |
| B．It falls off the polymer and triggers drug release. |
| C．It has not come onto the market up till now. |
| D．It is not effective enough and could be poisonous. |
| A．protected | B．formed | C．exposed | D．combined |