试卷详情
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大学英语六级综合-阅读(三)
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[单项选择]How Ozone Pollution Works
Introduction to How Ozone Pollution Works
The weather report on the radio or TV tells you that it is going to be sunny and hot and that an orange ozone alert has been issued. What is ozone What does an orange alert mean Why should you be concerned about it
In this article, we will examine what ozone is, how it is produced, what health hazards it poses and what you can do to reduce ozone pollution.
Ozone is a molecule of three oxygen atoms bound together (O3). It is unstable and highly reactive. Ozone is used as a bleach, a deodorizing agent, and a sterilization agent for air and drinking water. At low concentrations, it is toxic.
Ozone is found naturally in small concentrations in the stratosphere, a layer of Earth’s upper atmosphere. In this upper atmosphere, ozone is made when ultraviolet light from the sun splits an oxygen molecule (O2), forming two single
A. a bleach
B. a oxidizer
C. a deodorizing agent
D. a sterilization agent for air and drinking water
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[单项选择]Sugar—Friend VS. Enemy
Sugar. It’s everywhere. It’s in our drinks, it’s in our foods, and it’s hidden in places we never would think of. Many would call sugar their friend in time of need, but in fact their so-called "good friend" could turn out to be their worst enemy in disguise.
Sugar for many is something they may have been battling with for a long time. Here’s a simple three-step process to help you start to win back the battle for your health. First Step--Awareness of What Sugar Really Does to Your Body
Most people will say they "know" that they shouldn’t have sugar, but they really can’t help it. To me that is a lack of true awareness of what sugar does to oneself. I don’t think many people will say that they want to hurt their body on purpose, but unless they know it’s really happening they will continue down that road. Sugar is slower to impact our health, and it’s that slow destructive process that is the most da
A. our good friend most of the time
B. a hidden enemy
C. a friend as well as an enemy
D. a longtime friend
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[单项选择]Earthquakes
An earthquake is one of the most terrifying phenomena that nature can dish up. We generally think of the ground we stand on as "rock-solid" and completely stable. An earthquake can shatter (粉碎) that perception instantly, and often with extreme violence.
Up until relatively recently, scientists only had unsubstantiated (无确实证据的) guesses as to what actually caused earthquakes. Even today there is still a certain amount of mystery surrounding them, but scientists have a much clearer understanding.
There has been enormous progress in the past century: Scientists have identified the forces that cause earthquakes, and developed technology that can tell us an earthquake’s magnitude and origin. The next hurdle is to find a way of predicting earthquakes, so they don’t catch people by surprise.
In this article, we’ll find out what causes earthquakes, and we’ll also find out why they can have such a devastating eff
A. when actually earthquakes happened
B. what actually caused earthquakes
C. how earthquakes happened
D. where actually earthquakes happened
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[单项选择]Higher Grades Challenge College Application Process
Josh Zalasky should be the kind of college applicant with little to worry about. The high school senior is taking three Advanced Placement courses. Outside the classroom, he’s involved in mock trial, two Jewish youth groups and has a job with a restaurant chain. He’s a National Merit semifinalist and scored in the top 3 percent of all students who take the ACT.
But in the increasingly frenzied world of college admissions, even Zalasky is nervous about his prospects. He doubts he’ll get into the University of Wisconsin, a top choice. The reason: his grades.
It’s not that they’re bad. It’s that so many of his classmates are so good. Zalasky’s GPA is nearly an A minus, and yet he ranks only about in the middle of his senior class of 543 at Edina High School outside Minneapolis, Minnesota. That means he will have to find other ways to stand out.
"It’s extremely difficu
A. Josh Zalasky should be the kind of college applicant with no more effort.
B. Josh Zalasky should be the kind of college applicant with little effort.
C. Josh Zalasky should be the kind-of college applicant with nothing to worry about.
D. Josh Zalasky should be the kind of college applicant with little to worry about.
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[单项选择]Eight Tips for Surviving Black Friday
If you’re celebrating Thanksgiving today, you might be considering venturing out to the Black Friday sales tomorrow morning. After all, there will be at least a few great deals--and you can do all your holiday gift shopping in one crazy sprint. In order to make it out with your sanity--and your wallet--intact, there are a few Black Friday tips I’d like to share.
1. Make Your Shopping List First
When I was little, I could sit for hours with the Black Friday ads (especially Toys R Us), telling whoever was listening that I wanted pretty much everything on each page. I may have grown out of Toys R Us, but I still see plenty I want flipping through the sales papers. Sometimes, I can even convince myself that I really need some great gadget (小玩意) that I hadn’t actually intended to buy. So, before I even start browsing through the sales papers, I make a list of items that I’m particularly loo
A. make a shopping list
B. make change on her shopping list
C. stick to her shopping list
D. prefer a new video game