Read the following article and select the best answer. Article: Sunscreens can offer protection from two types of ultraviolet (UV) rays : UVB, which according to the Skin Cancer Foundation, are the chief cause of sunburn and play a key role in the development of skin cancer, and UVA, which get through the skin more deeply and are largely responsible for skin aging and wrinkling, as well as skin cancer risk. The SPF measurement on sunscreens refers to the UVB protection level -- and the number may not mean what you think it does. SPF 15 doesn't protect you from 15% of UVB rays, just as SPF 100 doesn't protect you from 100% of the rays. In fact, as you get into the higher numbered SPF sunscreens (think: 50 and above), the difference in UVB protection is actually pretty small. Theoretically, though the increase in UVB protection with a super-high SPF sunscreen may be not worth considering, it may help, and certainly can't hurt, to use it -- that is, as long as you do so correctly. "The only _ is whether you're giving yourself a sense of false security," Dr. Gohara says. Indeed, as Dr. Wang also pointed out, when people choose increased SPFs, they may actually feel so protected by the product that they finally ignore proper sun protection. "When people use really high SPF products, they tend not to reuse, they tend to stay out in the sun much longer, and they don't use other protective measures such as clothing and hats," he says. Regardless of any increase in protection that a high SPF may or may not offer, one thing is certain: It doesn't give your body a free pass from sunburns, aging, or cancers, and it doesn't protect you from those things for any greater length of time than the lower SPF options. Both Dr. Wang and Dr. Gohara emphasized that, no matter what the SPF is, it's important to reapply your sunscreen every two hours. Question: What rays can cause skin cancer according to the text? - UV - UVA - UVB - UVA&UVB
UVA&UVB

Read the following article and select the best answer. Article: Recently, another study has been carried out about who is the greatest American president. Sixty-five presidential historians took part in it and they judged the past forty-two American leaders based on ten qualities of leadership, which include public persuasion, crisis leadership, the management of economy, moral leadership and international relations. The historians also looked at administrative ability, relations with Congress, goal setting and pursuit of equal justice for all. Finally, the experts considered performance based on the historical period in which the president lived. The historians chose Abraham Lincoln as America's greatest president. He had also been named best president in a similar study in 2000. Abraham Lincoln was the only president in American history to lead the nation during the Civil War in the 1860s. He united the nation at last. And he took the first steps that destroyed the institution of slavery in America. Edna Medford is a professor of history at Howard University in Washington, D.C. She was an adviser on this study and the earlier one. She says Abraham Lincoln is seen to represent the values that the nation most honors like truthfulness, moderation and respect for human rights. The historians named America's first president, George Washington, as second on the list of greatest presidents. Franklin D. Roosevelt, Theodore Roosevelt and Harry Truman are next in that order. John F. Kennedy, the country's first Roman Catholic president, is sixth on the list. Like Abraham Lincoln, John F. Kennedy was murdered while in office. Among recent presidents, Ronald Reagan was named the tenth best president. Bill Clinton was rated fifteenth. And the historians rated former president George W. Bush as number thirty-six. His father, George H.W. Bush, did much better. He was rated as number eighteen. Question: According to the passage, the greatest American president from No.1 to No.6 should be _ . - Abraham Lincoln - George Washington - Franklin - Abraham Lincoln - George Washington - Theodore Roosevelt- Franklin - George Washington -Abraham Lincoln -John F. Kennedy -Theodore Roosevelt -Harry Truman - Franklin - Roosevelt
Abraham Lincoln - George Washington - Franklin

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Read the following article and select the best answer. Article: Doctor Manette had suddenly disappeared. Everything was done to discover some trace of him, but in vain. The loss of her husband caused his wife such pain that she decided to bring up her little daughter, Lucie, in ignorance of her father's fate, and when in two years she died she left little Lucie under the guardianship of Mr. Lorry. After eighteen years, strange news concerning the doctor had just come from Paris. Mr. Lorry, told Lucie, "your father has been found. He is alive, greatly changed, but alive. He has been taken to the house of a former servant in Paris, and we are going there." On arrival, the banker and Lucie were taken to an attic, where a haggard , white-haired man sat on a low bench, making shoes. He was sheltered by a man by the name of Defarge who, with his wife, kept a wine-shop in the district of St. Antoine. Charles Darnay was of noble birth; but his ancestors had for many years so cruelly oppressed the French peasants that the name of Evremonde was hated and looked down upon. Unlike them in character, this last descendant of his race had given up his name and wealth and had come to England as a private gentleman, eager to begin a new life. Sydney Carton was a young English lawyer. _ soon became frequent visitors at the small house in Soho Square, the home of Doctor Manette and his daughter. Through Lucie's care and devotion, the doctor had almost completely recovered from the effects of his long imprisonment, and it was only in times of strong excitement that any trace of his past foolish behaviors could be discovered. The sweet face of Lucie Manette soon won the hearts of both the young men, but it was Darnay to whom she gave her love. They married. The French Revolution had actually begun and in 1792 Mr. Lorry and Charles Darnay landed in Paris, the former to protect the French branch of Tellson & Co. and the latter to help an old family servant -Gabelle-who had begged his help. Not until they had set foot in Paris did they realize what a caldron of fury they had been involved... Question: what can we learn about Doctor Manette? - Defarge helped him to return to normal. - He lived on making shoes in St. Antoine. - He once experienced much suffering in prison. - He was ashamed to reunite with his daughter.
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He once experienced much suffering in prison.