Question: Article: An annoying problem for humans, who like to boast about all the distant planets and moons we have explored, is that we've never taken a good look right under our noses. The inside of the earth is relatively close, but how can we get there? The deepest oil well enters a mere six miles into the crust (the center of the earth is about 4,000 miles deeper). Russian scientists dug the deepest hole in Siberia, but bottomed out at about 7.5 miles below the surface. The Mohole project, a U.S. plan in the 1950s, called for drilling a hole 25 miles down to the boundary between the hard rocks of the crust and the soft mantle . Sadly the project involved government supporting. It gets harder and harder to drill deep into the earth because rocks get softer and softer. Hard but easily broken at the surface, rocks become plastic at depth, and the pressure caused by the weight of the overlaying crust --- about 52,800 pounds per square inch at a depth of ten miles, makes further drilling impossible. What little we know about the inside of the earth (like the fact that there's a crust, a mantle, and a core) comes from indirect evidence, such as the analysis of earthquakes. So maybe it's time for a thorough new method to explore the earth's inside. Scientist David Stevenson says we should forget about drilling holes. Instead, we should open a crack . Stevenson suggests digging a crack about a half mile long, a yard wide, and a half mile deep (not with a shovel) but with an explosion on the scale of a nuclear bomb. Next, he'd pour a few hundred thousand tons of molten iron into the crack, along with a robot. The iron, thicker than the surrounding crust, would move downward at about 16 feet per second, carrying the robot with it and opening the crack deeper and deeper. The iron mass would drop for about a week and 2,000 miles to the outer edge of the earth core, the robot sending out data to the surface. Stevenson compares his idea to space exploration. "We're going somewhere we haven't been before,"he says. "In all... Question: Going inside the earth is _ than going into space. Yes or no, is the answer "more challenging"?
Answer: No

Question: Article: Many people think it is safe to use a cell phone while they are driving. Yet Scores of studies suggest that real multitaskers - those who can carry out multiple tasks equally well, make up just 2 per cent of the population. More surprisingly, the so-called "supertaskers" actually have differently structured brains to the other 98 percent. The brain areas that make supertaskers differ from the rest of the population are the same parts that are most different between humans and nonhuman primates , according to David Strayer, director of the applied cognition lab at the University of Utah. Scientists are unsure of the reason why some brains are different. In fact, we could all benefit from doing just one task at once. In most of us, scientists have located a "bottleneck in the brain" that may explain why we find it hard to do two things at once. The problem appears to be caused by a logjam of nerve messages. Faced with two almost simultaneous tasks less than 300 milliseconds apart, the brain's ability to deal with the second one slows down. The neural response to the second task was postponed until the response to the first was completed. This means that with e-mails, phone calls, text messages and online social media all competing for our attention, often against a background of television, radio or music, our brains can reach information overload. Scientists made the discovery after scanning the brains of volunteers attempting to multitask on a computer. The task was deliberately designed to involve the use of different senses and _ responses. Dr Rene Marois, one of the neuroscientists who carried out the experiment at Vanderbilt University in Nashville, Tennessee, said: "Our research offers neurological evidence that the brain cannot effectively do two things at once." The next step, the neuroscientists say, is finding out "why these areas cannot process two tasks at once." Question: We can infer from the article that the brain takes 300 milliseconds to _ . Yes or no, is the answer "make a neural response"?
Answer: No

Question: Article: The year is 2094. It has been announced that a comet is heading towards the earth. Most of it will miss our planet, but two pieces will probably hit the southern half of the earth. On 17 July, a piece of 4 kilometers wide comet enters the Earth's atmosphere with a massive explosion . About half of the piece is destroyed, but the remaining part hits the South Atlantic at 200 times the speed of sound. The sea boils and a huge hole is made in the seabed. Huge waves are created and spread outwards form the hole. The wall of water, a kilometer high, rushes towards southern Africa at 800 kilometers an hour. Cities on the African coast are totally destroyed and millions of people are drowned . Before the waves reach South America, the second piece of the comet lands in Argentina. Earthquakes and volcanoes ash set off in the Andes Mountains. The shock waves move north into California and all around the Pacific Ocean. The cities of Los Angeles, San Francisco and Tokyo are completely destroyed by earthquakes. Millions of people in the southern half of the earth are already dead, but the north won't escape for long. Because of the explosions, the sun is hidden by clouds of dust, temperatures around the world fall to almost zero. Crops are ruined. The sun won't be seen again for many years. Wars break out as countries fight for food. A year later, no more than 10 million people remain alive. Could it really happen? In fact, it has already happened more than once in the history of the earth. The dinosaurs were on the Earth for over 160 million years. Then 65 million years ago they suddenly disappeared. Many scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn't live through the cold climate that followed and they died out. Will we meet the same end? Question: By giving the example of dinosaurs, the author tries to prove _ . Yes or no, is the answer "the Earth could be hit by other objects in space"?
Answer:
No