#### 题目列表

n=50!

What is the greatest prime factor of n?

_____
1.3, 1.9, 2.4, 2.4, 3.6, 4.4, 5.3, 5.7, 7.5, x

The list shows the weights, in kilograms, of 10 packages shipped today by a certain company, where x is at least 7.5. If a and b are the average (arithmetic mean) and the median, respectively, of the weights, in kilograms, of the 10 packages, which of the following could be the value of a - b?

Indicate all such values.
Let a, b, and c be integers greater than or equal to 2. When b is divided by c, the remainder is 0. When a is divided by b, the remainder is c. Which of the following is equal to the remainder when a is divided by c?

In triangle ABC shown, what is the length of line segment AD ?
In the xy-plane, the point (t, t-1) lies on the line with equation y = $- \frac{1}{2}$ x +$\frac{1}{3}$ . What is the value of t?
Two seating arrangements of people around a circular table are called the same if, for each seated person, the same person is seated to that person`s immediate right in both arrangements.

#### Quantity A

The number of different seating arrangements of 4 people around a circular table

#### Quantity B

8

There are 25 students in a class. 15 of them take Course A, 12 of them take Course B, and 8 of them take Course C. If each student has to take at least one course, then what is the greatest possible number of students who take all the three classes simultaneously?
Each time a certain coin is tossed, it lands either heads up or tails up. If the coin is to be tossed 3 times, what is the probability that it will land heads up 2 times?
If both the sum and the product of the four positive integers a, b, c and d are even, while the product of a, b, c and d is multiple of 8, but not multiple of 16, then what is the number of these integers that could be even?
Any time the double helix of DNA is cut, the cell initiates what is usually ____________ repair to the break: during the mending process, a few letters of DNA usually get deleted.
Translators are becoming less rather than more (i)____________. Few readers are (ii)____________ the person who translates their favorite foreign novelist, even though that person will have a huge influence on the tone and feel of every page.
The comments are (i)____________ to be sure, meant to suggest new lines of research rather than to deal with the subject in (ii)____________ manner.
Which of the following best describes the function of the highlighted sentence?
Which of the following statements about Baksei Chamkrong can be inferred from the passage?
During the early years of the United States environmental movement in the 1960s and 1970s, alarmed activists, warning that nature was in danger of being irredeemably destroyed by human activity, demanded a variety of environmental protections, including the preservation of wilderness areas as national parks. But these environmentalists' conceptual framework came under scrutiny shortly thereafter as cultural critics--especially those who were part of the theory revolution that transformed and preoccupied literary study into the end of the century--began to spread the postmodern wisdom that these parks museumized nature and that the wilderness they tried to preserve was not the primeval wild but a social construction. A consensus was growing that all areas of human life--from people's personal attitudes to the mediascapes they inhabited to the ideas they formed and the built worlds in which they dwelt--were socially constructed; and these attitudes were quickly extended to nature, especially since ecologists and environmental historians had become so clear in demonstrating the determinative effects on nature of human beings, from ancient to modern times.

One important result of this change in thought was that a number of qualities that 1960s and '70s activist ecologists had felt nature self-evidently possessed seemed to be suddenly undercut--and in a startling and provocatively contrarian manner. Most important, nature's once apparent-Otherness seemed suddenly to be no more. In fact, it seemed to vanish in a number of different ways. Human beings had so encroached on nature, the apocalypticists had shown, that nature was no longer independent of people. Supplementing this sense of radical contemporary change were environmental historians' insights into how radically the earth's ecosystems had been reshaped over the course of human history, from the emergence mankind to the invention of agriculture to the rise of modern society. Ideas of a timeless or pure nature were thus discredited. Finally, on the level of intellectual history, nature's "otherness" was undermined in an equally decisive manner when cultural theorists began to argue that this supposed attribute was not only a socially constructed ideology, but an ideology of surprisingly recent vintage. The "otherness" of nature was an ideology that had been put in place during the romantic period of the nineteenth century--and put in place so decisively that it seemed to be the nature of nature.

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