A. color B. bones C. shape D. cells E. hide F. dangerous G. change H. go I. reflect J. another K. odd L. amazing |
Octopuses are masters on disguise (伪装). They can change their appearance in less than a second.
How do they do this? An octopus can disguise itself in three ways. One is by using
Why are octopuses so good at disguising themselves? They have to be. The ocean is not a safe place for them. Because they have no
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A. adapt to B. stir up C. are dying out D. makes out E. search for F. be aware of |
The World Wide Fund for Nature (WWF) is concerned about the many species of plants and animals that
A. predictions B. tricky C. determine D. consumed E. significant F. sampled G. address H. concentrations I. comparison J. conventional K. index |
Using dragonflies as contamination(污染) detectors
Mercury(汞)pollution from power plants and mining operations can end up in our air and water.
But it’s
“We were working on developing a bioindicator, a biosentinel, that could inform us of the levels of mercury contamination across the US.”
Ecologist Collin Eagles-Smith of the United States Geological Survey and his colleagues came up with a practical way to
“If you have enough locations
The team measured mercury
The volunteers used dip nets to collect dragonfly larvae from their aquatic abodes(住所). National park staff then sent the larvae to laboratories for processing. For
“Using the relationships between dragonfly concentrations and fish concentrations, we were able to develop what we call an impairment
That index allowed the researchers to make health risk
“About 12% of the locations posed what we consider to be high or severe risk of health impairments to fish, wildlife or humans if they
“And that can inform future management actions to
The study is in the journal of Environmental Science & Technology.
Like many people acting on the desire to eat healthy and local, Acropolis resident Eduardo Jimenez decided to plant a garden in his backyard. He ploughed the soil, he planted the seeds, and he even set up a fence to keep out the deer. Eduardo did everything right. Or so it seems. However, when
Unlike their picky cousins, stink bugs feed on some 300 species of plants, including figs, blueberries, corn, and kiwi fruits as well as soybeans, peas, and weeds. Although they do little damage to the plant itself, they make the fruits and vegetables
Last season alone, several New Jersey pepper farmers saw 75% of their crops damaged. Pennsylvania lost half of its peach population, and, according to the US Apple Association, apple farmers in the mid-Atlantic states lost $37 million. This year could be worse. As a result of this
The larvae(幼虫) of the wasp consume the stink bug from the inside. But the
A. acknowledgement B. actually C. commonly D. confirm E. conscious F. crack G. eliminate H. independent I. log J. shortcut K. unimaginative |
Why Your Password May Not Be As Safe As It Seems
Does “qaz2ws” strike you as a nice safe password? What about “adgimptw”? An analysis has found them to be among the passwords that are most
When ten million passwords were leaked to the internet, they appeared to
While many of the passwords were still single words, such as “password”, there was also a clear attempt by many to make them harder to
“Users are becoming slightly more
But
Perhaps this is why some companies are now trying to move gradually beyond passwords. Yahoo! is giving users the option to associate their mobile phone with an account, and have a single use password texted to it each time they want to
Although the service is voluntary, Dylan Casey, an executive at Yahoo!, said that it was “the first step to
It would certainly be a more sensible strategy than some people’s improving upon “password” by using “password” or tran5p053d numb3r5f0r13tt3r5.
“We are, for the most part, predictably
Nowadays, there are many companies offering genetic(基因的) testing for children’s talents. A large number of people
A. evident B. relatively C. concentration D. dissolved AB. rough AC. necessarily AD. evolved BC. reach BD. common CD. consume ABC. access |
Studies have shown that the love children have for sugar may be innate. The preference for sweet foods is found to be already
One study showed that adults tend to max out their sugar preference at about the level of sugar in a can of soda, but older children still liked drinks that were twice as sweet. The scientists couldn't find a limit to the
In the times of early humans, those who ate the most calories had a better shot at survival and thus at passing on their genes. Fruit, the most
Now, of course, sugar is no longer scarce and we
Will we start to adapt to our new, easy