The number of ways we can choose r objects from a total of n objects, when the order in which the r objects are listed does matter is given by the permutation formula:

How many permutations are possible when choosing 4 objects from a total of 10 objects?

[单选题]When we say that two objects have relative motion, we mean （）.A . the distance between them remains the sameB . the distance between them is changingC . the position between them is not changingD . their positions to the earth remain the same

[单选题]Which of the following objects was an important woodworking tool used by early American craftsmen?A．A bustB．A decoyC．A figureheadD．A chisel

[单选题]In object-oriented(51), objects can be viewed as reusable components, and once the programmer has developed a(52)of these components, he can(53)the amount of new coding required. But(52)a(54)is no simple task because the integrity of the Original sof

[单选题]Which of the following can we infer from the passage?A．Everyone has his lucky day.B．The supermarket is dishonest.C．The supermarket might just play a trick so customers should be more cautious.D．Wives should listen to their husbands.

[单选题]When the order （） is received from the bridge, the main air stop valve in the starting air line should be shut.A . stand-by engineB . full aheadC . finished with engineD . full away

[单选题]When we write, we must write as ______as we can.A.careful B.carefully C.mor

[主观题]F．rom the conversation we can infer that the potential buyer would probably place a big order if the seller offer of at least 10 percent.

[单选题]We can infer from the passage that ______.A． abstract thinking does not come from physical experiencesB． feelings of warmth and coldness are studied worldwideC． physical temperature affects how we see othersD． capable persons are often cold to others

[单选题]F．rom the text we can conclude that the author ________.A． is supportive of Mr. ScrushyB． favors Ms. Lewis's sideC． takes a detached attitudeD． is sympathetic

[单选题]We can infer from the passage that （ ）A． abstract thinking does not come from physical experiencesB． feelings of warmth and coldness are studied worldwideC． physical temperature affects how we see othersD． capable persons are often cold to others