British paychologists have found evidence of a link between excessive Internet use and depression, a research has shown. Leeds University researchers, writing in the Psychopathology journal, said a small part of Internet users were classed as Internet addicts and that people in this group were more likely to be depressed than non-addicted users. The article on the relationship between excessive Internet use and depression is from a questionnaire-based study of 1,319 young people and adults. The respondents answered questions about how much time they spent on the Internet and what they used it for; they also complete the Beck Depression Inventory---a series of questions designed to measure the seriousness of depression. The six--page report, by the university's Institute of Psychological Science, said 18 of the people who complete the questionnaire were Internet addict."Our research indicates that excessive Internet use is associated with depression, but what we don't know is which comes first--are depressed people drawn to the Internet or does the Internet cause depression?" the article's lead author Dr Catriona Morrison said."What is clear is that, for a small part of people, excessive use of the Internet could be warning signal for depressive tendencies." The age range of all respondents was between 16 and 51 years, with an average age of 21.24. The average age of the 18 Internet addicts was 18.3 years. By comparing the levels of depression within this group to that within a group of 18 non--addicted Internet users, researchers found the Internet addicts had a higher chance of developing depression than non-addicts. They also discovered that addicts spent more time visiting sexually pleasing website, online gaming sites and online communities. "The public speculation was further proved by this study. That's to say, over-engaging in websites which serve to replace normal social function might be linked to psychological disorders like depression and addiction," Morrison said."We now need to consider the... According to Dr Catriona Morrison, the public speculation _ . A) lacks scientific evidence B) helps clarify their study C) finds a theoretical basis D) has little scientific value
C
(Question)
When an ant dies, other ants move the dead insect out. Sometimes, the dead ant get moved away very soon--within an hour of dying. This behavior is interesting to scientists, who wonder how ants know for sure--and so soon--that another ant is dead. One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist. Choe found that Argentine ants have a chemical on the outside of their bodies that signals to other ants, "I'm dead--take me away." But there's a _ to Choe's discovery. Choe says that the living ants--not just the dead ones--have this death chemical. In other words, while an ant crawls around, perhaps in a picnic or home, it's telling other ants that it's dead. What keeps ants from dragging away the living ants?Choe found that Argentine ants have two additional chemicals on their bodies, and these tell nearby ants something like, "Wait--I'm not dead yet." So Choe's research turned up two sets of chemical signals in ants: one says, "I'm dead," and the other set says, "I'm not dead yet." Other scientists have tried to figure out how ants know when another ant is dead. If an ant is knocked unconscious, for example, other ants leave it alone until it wakes up. That means ants know that unmoving ants can still be alive. Choe suspects that when an Argentine ant dies, the chemical that says "Wait-I'm not dead yet" quickly goes away. Once that chemical is gone, only the one that says "I'm dead" is left. "It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard, not because its body releases new unique chemicals after death," said Choe. When other ants detect the "dead" chemical without the "not dead yet" chemical, they drag away the body. Understanding this behavior may help scientists figure out how to stop Argentine ants from invading new places and causing problems. Choe would like to find a way to use the newly discovered chemicals to spread ant killer to Argentine ant nests. The ants' removal behavior is important to the... Ants judge whether another one is dead or not depending on _ . A) the sense of taste B) the sense of smell C) the sense of touch D) the sense of sight
(Answer)
B
Question: A green roof is a roof of a building that is covered with vegetation over a waterproof membrane . It is a proper method of growing plants on the roof and does not refer to the mere green color of the roof. People benefit a lot from these green roofing systems, and they are gaining popularity day by day. Human beings have occupied major areas of land and transformed them into huge buildings, which has severely affected the environment and the natural habitat of bird and insects. Green roofing compensates for that. It creates a natural habitat for creatures like bees, grasshoppers and other insects. Modern roofs need a lot of energy to control the temperatures in winter and summer. However, green roofs reduce the amount of energy required for controlling temperatures, thus making them energy-efficient. As green roofing is highly energy-efficient, it can act as a encouragement for people who are interested in green roofing systems and their benefits. It will increase the market value of the building and fetch the owner a great share of profit. As the vegetation requires a water supply, there is a inbuilt water preservation layer in the green roof system. This layer helps to keep the rainwater. It makes full use of the rainwater and prevents wastage. During heavy rains, the water runs off the flat roof. The green roof prevents this overflow by slowing down the volume of running water. Green roofs can compensate for the lost greenery in urban areas and increase the artistic value of an area. Your building will look beautiful, coated with green vegetation. Green roofs can serve as local community garden and create a natural atmosphere, giving physical and psychological benefits like reducing stress levels in people and keeping them physically fit. Besides, people can start their own small-scale cultivation and experience the pleasure of gardening. How do the plants on green roofs get watered? A) Rainwater is often kept in the green roof system for later use B) They mainly make use of the wasted water in people's lives C) The plants on green roofs usually need little water D) People have to water the plants from time to time
Answer:
A