Read the following article and select the best answer. Article: It is not always easy to understand inventions and new developments in science. To understand fiber optics , however, you can try an experiment. Put a drop or two of milk into the glass of water. Turn off the lights. Shine the light from your flashlight through the top of the glass at an angle of about 45 degrees. Put a piece of white paper against the glass when the beam of light is shining. Move the paper so you can see where the beam is coming out of the glass. You should see a spot of light. Some of the light has passed through the water and through the glass. You see it on the paper. You also see another beam going down into the glass. It is being reflected down into the glass. Next move the flashlight so that the beam is coming straighter down(30 degrees) into the water. You will see the same phenomenon: some of the light is reflected back into the glass. And some escapes out. Now move the beam of light from the flashlight slowly up until you cannot see any light escaping. This point is called the "point of total internal reflection." The word internal means "inside." All the light is staying inside the glass. There is no beam showing a bright spot on the white paper. All the light energy is inside the glass. The glass of milky water is like a strand of glass. A fiber optic tube is a bundle of long thin strands of glass, really many tubes. However, the principle is the same: at a certain angle, all the light energy that goes into the glass fiber comes out the other end. Light is energy. Sound is energy. Radio waves and electricity are both energy. They can all be changed into light, and as light they can all travel along a glass fiber. Light travels at the rate of 186,000 miles per second. Therefore, a message can travel that fast in a glass fiber. This is the principle, or law of nature, that makes fiber optics work. Question: Which of the following can be the best title? - Experiment of Light Travel - Principles of Fiber Optics - Communication on Fiber Optics - Theory of Light Travel
Principles of Fiber Optics

(Question)
Read the following article and select the best answer. Article: One night about nine o'clock, Dr. Eyck, a surgeon, had a phone call from Dr. Haydon at the hospital in Clens Falls. The surgeon was asked to go there at once to operate on a very sick boy who shot himself while playing with a gun. The doctor was soon on his way to Clens Falls. It was 60 miles away. And it was snowing heavily in the city. The surgeon thought he could get there before 12 o'clock. A few minutes later, the doctor was stopped by a man in an old black coat. Gun in hand, the man ordered the doctor to get out. Then the man drove the car down the road, leaving the doctor in the falling snow. It was after 2 o'clock in the morning when the doctor arrived at the hospital in Clens Falls. Dr. Haydon told him that the boy had died an hour before. The two doctors walked by the door of the hospital waiting room. There sat the man in the old black coat with his head in his hands. "Mr. Cuninghan," said Dr. Haydon to the man, "This is Dr. Eyck. He is the surgeon who walked all the way from Albany to save your boy." ,(A, B, CD),. Question: Dr. Haydon asked Dr. Eyck to come to Clens Falls because _ . - The boy needed the help of a surgeon - Dr. Eyck knew the boy was wounded by a shot - Dr. Eyck was the boy's father - Dr. Eyck was Haydon's friend
(Answer)
The boy needed the help of a surgeon

Ques: Read the following article and select the best answer. Article: Air conditioning, watermelons, ice cream-we have all kinds of gadgets and food to get us through the summer. But what could be better during the hot months? The following are a few special and well-known water parks around the world. Take a good look, and know what the real water parks look like. Noah's Ark Location: Wisconsin Dells, Wisconsin, US Noah's Ark offers many water slides. The most notable ride is the Black Anaconda. At more than 400 meters in length, it is the US' most thrilling water coaster and sends riders spiraling down at speeds of up to 48 kilometers per hour. Plus, with 18 indoor water parks, Wisconsin Dells offers plenty of splashes for water lovers. Tropical Islands Resort Location: Brandenburg, Germany This resort offers the largest indoor water park in the world-at 65,961 square meters. And its indoor pool can hold 6,000 visitors at a time. As Europe's largest tropical holiday world, Tropical Islands is more than a water park. It's a fully functional resort, featuring a theme park, an artificial rainforest, a lagoon, a beach, steam baths, saunas and many shops and restaurants. There are also several water slides and other activities that people of all ages can enjoy. Las Cascada Water Park Location: Aguadilla, Puerto Rico Las Cascada is well known for its unbelievable beauty. It is surrounded by tropical mountain forests and situated close to the ocean. The water ride, E1 Rio Pasivo, carries riders through the whole water park. They can see the mountains and waterfalls around it. Chimelong Water Park Location: Guangzhou, China It is one of the largest water parks in Asia. With its advanced technology, it also has many new aquatic facilities in the industry. One of the park's rides offers a tube conveyor that transports riders up a 19-meter-tall tower. The park has implemented a special water treatment system that ensures safe PH levels and removes harmful germs. Question: Which of the following water parks sounds the cleanest? - Noah's Ark - Tropical Islands Resort. - Las Cascada Water Park. - Chimelong Water Park.
Ans: Chimelong Water Park.

Question: Read the following article and select the best answer. Article: When travelers think of an Adriatic cruise, scenes of Venice, Italy--its canals, bridges, piazzas, and stunning architecture--come to mind. It's one of the most popular cruise destinations in Europe. And for many, the sail-away from Venice, through its Giudecca Canal, is an awe-inspiring experience. Venice may be known as La Serenissima, or "the most peaceful," which, however, isn't entirely accurate these days. Venetians have been increasingly concerned about the impact of tourism and the potential for an environmental disaster off its shoreline due to the number of cruise ships that enter and exit its lagoon . That's why earlier last month, Venice announced a new policy to forbid the transit of cruise ships to the city via the Giudecca Canal. It's not that the city wants to shun the cruise industry altogether: It simply wants to force traffic further away from the landmarks along the shoreline. City officials say that most ships will now transit the Contorta Sant'Angelo Canal. Additionally, the city is _ the size of ships that can visit Venice, as well as the total number of ships that call on it on a daily basis. As of January 2014, Venice plans to reduce the visitations of larger ships (those that are 40,000 tons or heavier) by 20 percent. This effectively caps the number of ships that can enter per day to five. In November, ships heavier than 96,000 tons will not be allowed to enter Guidecca Canal at all. How the city plans to carry out the new five-ships-per-day rule remains to be seen and have yet to be announced. Which ships will be allowed passage? Will it be first-come, first-served? However they proceed, cruise line executives want their passengers to know that Venice will remain a regular port of call--even if the transit to and from the city must evolve. Question: The new policy was issued in order to _ . - stress the accuracy of Venice's fame for peace - reduce the damage to Venice's enviironment - depend less on the crusie industry - limit the number of toursits
Answer:
reduce the damage to Venice's enviironment