OG19新题 题目总数：142 做题总人数：8255 平均准确率：75.1%
In 1913, the largely self- taught Indian mathematician Srinivasa Ramanujan mailed 120 of his theorems to three different British mathematicians;only one, G. H. Hardy, recognized the brilliance of these theorems, but thanks to Hardy’s recognition, Ramanujan was eventually elected to the Royal Society of London.
来源：精选题库 79人已做 650难度 65.8%正确率
Unlike historical evidence of weather patterns in other regions of the world, which scientists find abundantly represented in tree rings, ancient glacial ice, or layers of sediment from seasonal plankton, the North Pole's clues about its past climates are almost nonexistent.
来源：OG21新题 390人已做 其他难度 77.9%正确率
The ages of tropical rain forest trees provide critical information for understanding the dynamics of tree populations, to determine historical patterns of disturbance, developing sustainable forestry practices, and calculating carbon recycling rates.
来源：OG21新题 392人已做 其他难度 92.3%正确率
Just like the Internet today, often being called an “information superhighway,” the telegraph was described in its day as an “instantaneous highway of thought.”
来源：OG21新题 388人已做 其他难度 59%正确率
Michelangelo, it is believed, had made his sculpture of David using an eight-inch plaster model that was recently discovered after being lost for nearly 300 years.
来源：OG21新题 398人已做 其他难度 48.2%正确率
Dinosaur tracks show them walking with their feet directly under their bodies, like mammals and birds, not extended out to the side in the manner of modern reptiles.
来源：OG21新题 452人已做 其他难度 39.8%正确率
In the six-month period that ended on September 30, the average number of Sunday papers sold by the company was 81,000 less than the comparable period a year ago.
来源：OG21新题 391人已做 其他难度 68.8%正确率
By skimming along the top of the atmosphere, a proposed new style of aircraft could fly between most points on Earth in under two hours, according to its proponents.
来源：OG21新题 442人已做 其他难度 59.3%正确率
As opposed to adults, pound for pound, children breathe twice as much air, drink two and a half times as much water, eat three to four times as much food, and have more skin surface area.
来源：OG21新题 394人已做 其他难度 54.3%正确率
Upon their first encountering leaf-cutting ants in South America, the insects seemed to some Europeans to be carrying bits of greenery to shade themselves from the tropical sun—hence the sobriquet “parasol ants.”
来源：OG21新题 443人已做 其他难度 83.1%正确率
According to the passage, the periodic behavior displayed by commuter diatoms under constant laboratory conditions is characterized by which of the following?
Because 70 percent of the people of India use wood as their sole fuel, ten million acres of forest have been lost there since 1960, resulting in wood now costing eight times as much to collect and distribute than in 1960.
In a blow to those who still harbored the illusion that E-mail exchanges are private, a watchdog group recently uncovered a trick for enabling an interloper to rig an E-mail message so that this person will be privy to any comments that a recipient had added as the message is forwarded to others or sent back and forth.
With near to all tortilla chips made from corn kernels that have been heated in a solution of calcium hydroxide (lime), this removes the skin of the kernel so water can penetrate.
Many population studies have linked a high-salt diet to high rates of hypertension and shown that in societies where they consume little salt, their blood pressure typically does not rise with age.
The cactus is now heavily plundered in deserts in the southwestern United States, so much that enforcement agencies in five states have created special squads for its protection.
What is the remainder when the positive integer n is divided by the positive integer k, where k > 1 ?(1) n = (k + 1)^3(2) k = 5
In a certain high school, 80 percent of the seniors are taking calculus, and 60 percent of the seniors who are taking calculus are also taking physics. If 10 percent of the seniors are taking neither calculus nor physics, what percent of the seniors are taking physics?
The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The least possible value of the actual area of the square region is
If k and n are positive integers such that n > k, then k ! + (n − k) · (k − 1)! is equivalent to which of the following?