Read the following article and select the best answer. Article: A new planet-hunting technique has detected the most earth-like planet yet around a star other than our sun, raising hopes of finding a space rock that might support life, astronomers reported recently. "This is an important discovery to answer the question 'Are we alone?'" said Michael Turner of the National Science Foundation. "The team has discovered the most earth-like planet yet, and more importantly, has proved the power of a new technique that is sensitive to detecting planets that are fit for people to live on," Turner said in a statement. In the last decade, astronomers have detected more than 160 planets moving around stars outside our solar system. Most of these have been gas giant planets like Jupiter, which are unfit for life. But an international team has detected a cold planet about 5.5 times more massive than the earth -- still small enough to be considered earth-like -- moving around a star about 20,000 light years away, close to the center of the Milky Way. To find this new planet, the team used a technique called gravitational microlensing . When a planet is circling the closest star, the planet's gravity can add its own signature to the light. This kind of light signature was observed on July 11 by a group of telescopes in a project known as OGLE, short for Optical Gravitational Lensing Experiment. "The main advantage of microlensing is the signals for low-mass planets: They're not weak signals. They're just rare," Bennett of the University of Notre Dame in Indiana said by telephone. "If there happens to be a straight line between a foreground star with its planet and the background source star, then you're able to detect that planet." Question: Which of the following statements is NOT true according to the passage? - The signals coming from low-mass planets are too weak to be noticed. - Most of the discovered planets are not fit for people to live on. - If a star with its planet happens to be in line with the source star, then the planet can be found. - The power of the new technique is proved by the discovery of the earth-like planet.
The signals coming from low-mass planets are too weak to be noticed.

(Question)
Read the following article and select the best answer. Article: Liu Hui is very excited. The students in a school in Shanghai will go to the USA with his parents during the Spring Festival. "Overseas touring has always been a dream for me," he said happily. Nowadays, Chinese people enjoy longer holidays, such as the three "Golden Week Holidays"(the Spring Festival, May Day and National Day). They have more time to travel. Rising incomes also make travelling abroad realistic for ordinary Chinese people. Nearly 7 million Chinese travelled overseas in 2001, according to the National Tourism Administration . The most common problem travellers face is how to choose the best routes . By the end of 2002, Chinese citizens were allowed to travel to 19 foreign countries and regions at their own expense. The top 10 places included Hong Kong, Macao and Thailand. European countries are also becoming increasingly popular. "More and more Chinese people have shown interest in travelling to Europe, particularly France and Finland," said Tan Wen, a general manager of China Youth Travel Service. "Sooner or later, there will be a peak in European tours." Another consideration is choosing the right travel agencies and finding the best price. The China Consumers' Association(CCA,)offered tips to consumers on choosing the right travel agencies to help prevent a relaxing vacation from turning into a costly disaster. "Price should not be the single most important factor in choosing a travel agency," said Zhang Yuanchao, CCA vice-secretary general. Consumers are advised to choose large State travel agencies with good reputations and official approval to organize overseas tour groups. Zhang's association dealt with more than 5, 000 complaints about travel agencies last year. And the majority of the complaints were about _ in travel routes, bad tour guides, and forced shopping. Travellers were warned to look carefully at their contracts with agencies and to buy travel insurance . Question: How many reasons are given in the article as to why ordinary Chinese people are traveling abroad more today? - Two. - Three. - Four. - Five.
(Answer)
Two.

Ques:Read the following article and select the best answer. Article: For decades, public health officials have puzzled over a surprising fact about HIV: Only about 10-20 percent of infants who are breastfed by infected mothers catch the virus. Tests show, though, that HIV is indeed present in breast milk, so these children are exposed to the virus multiple times daily for the first several months of their lives. Now, a group of scientists and doctors from Duke University has figured out why these babies don't get infected. Human breast milk naturally contains a protein called Tenascin C that neutralizes HIV and, in most cases, prevents it from being passed from mother to child. Eventually, they say, the protein could potentially be valuable as an HIV-fighting tool for both infants and adults that are either HIV-positive or at risk of contracting the infection. The research, published in Proceedings of the National Academy of Sciences, was inspired by previous work by other researchers showing that, both in tissue cultures and live mice, breast milk from HIV-negativemothers was naturally endowed with HIV-fighting properties. Scientists suggested that a few different proteins in the milk could potentially be responsible, but no one knew which one. As part of the study, the researchers divided breast milk into smaller fractions made up of specific proteins via a number of filters -- separating the proteins by size, electrical charge and other characteristics--and tested which of these fractions, when added to a tissue culture, prevented the cells from being infected by HIV. Eventually, they found that one particular protein was present in all the HIV-resistant fractions but in none of the others: Tenascin C. Tenascin C works by blocking a key protein on HIV's envelope that normally ties up to a receptor on a T cell's membrane called CCR5. In doing so, Tenascin C prevents HIV from mixing with the T cell and injecting its RNA inside. Still, the researchers say that other natural elements in milk might play a role in fighting HIV as well. "It's clearly not the whole story,... Question: Which of the following about Tenascin C is true? - It has become an effective tool in fighting HIV. - It was first found by Permar and her research group. - It can prevent transmission in a live animal effectively. - It can sometimes prevent mother-to-child transmission of HIV.

Ans:
It can sometimes prevent mother-to-child transmission of HIV.