题目内容
Now , in our country free medical treatment covers sickness of mind as well as sickness.
A．normal B．average C．regular D．ordinary
D
Visitors can find a small, old house called the O. Henry Museum in central Austin, Texas. William Sydney Porter(1862-1910)----better known as O. Henry, was one of America’s best loved writers of short stories. Beginning in 1893, he lived here. It was saved from destruction, moved, and turned into a museum in 1934. The museum is a good way to learn about the interesting life of him.
William Porter rented this house and lived with his wife and daughter for about two years. Many objects in the museum belonged to the Porters. Others did not, but are in the house to recreate the way it looked during their lifetime.
Porter worked at a pharmacy, farm, land office and bank. He also loved words and writing. The museum has special proof of Porter’s love of language---his dictionary. It’s said that he read every word in it. Porter started a small publication called “The Rolling Stone”. He wasn’t being published early on, so he published himself. His funny stories, poems, and drawings were published in the magazine. But it was too costly to continue for long, so he closed the project after about one year.
Other troubles would lead the Porters to leave Austin. Porter was accused of financial wrongdoing at the bank and lost his job. Fearing a trial, he fled the country. But he returned because his wife was dying. After her death, he faced trial and was found guilty. He served three and a half years in a federal prison in Ohio.
Porter would keep his time in prison a secret. But there was one good thing about it. It provided him with time to write. By the time of his release, he had published 14 stories and was becoming well-known as O. Henry.
Porter would later move to New York City and find great success there. He published over 380 stories in the last eight years of his life.
【小题1】What is the author’s purpose of writing paragraph 3?
| A．To attract more visitors to the O. Henry Museum. |
| B．To show the jobs O. Henry once did. |
| C．To show O. Henry’s early love of words and writing. |
| D．To introduce O. Henry’s publication called “The Rolling Stone”. |
a. He was committed to prison.
b. He settled down in central Austin.
c. His wife died.
d. He started a small publication called “The Rolling Stone”.
e. He moved to New York City.
| A．bdcae | B．bcade | C．bdcea | D．bacde |
| A．Most of O. Henry’s short stories were finished in prison. |
| B．O. Henry didn’t start his career as a successful writer when living in central Austin. |
| C．O. Henry was born in a small, old house which is called the O. Henry Museum now. |
| D．O. Henry spent his last life in the small, old house in Texas. |
| A．O. Henry’s experience in prison. |
| B．The objects in the O. Henry’s Museum |
| C．O. Henry’s achievement in literature. |
| D．A brief account of O. Henry’s life |
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 |
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 |