单选题A product that represents a clear technological
单选题What is the value of xyz? 1 x = y2 and z = 2x5. 2 xz=52 and 1y=110.
单选题At a certain university recreation center, a member can receive a 30-minute massage, a 60-minute massage, or a 90-minute massage, and is charged $0. 50 per minute for each massage. A member receiving
单选题某教授给学生打分，一共有a，b，c，d，e 5个档次。问至少有多少个学生才能保证有6个人拿到同样的分数?
单选题n percent of 1007 is
单选题Sprinklers are being installed to water a lawn. Each sprinkler waters in a circle. Can the lawn be watered completely by 4 installed sprinklers?1 The lawn is rectangular and its area is 32 square yard
单选题A box of light bulbs contains exactly 3 light bulbs that are defective. What is the probability that a sample of light bulbs picked at random from this box will contain at least 1 defective light bulb
单选题When 29 of the votes on a certain resolution have been counted, 34 of those counted are in favor of tie resolution. What fraction of the remaining votes must be against the resolution so that the tota
单选题How many "+" added to the nine numbers below can make the result 99?Adjacent numbers can form a two-digit number123456789
单选题一把钥匙只能开一把锁，现有10把钥匙。10把锁，但是不知如何搭配，最多要试验多少次才能搭配好?
单选题If x, y and z are different positive integers less than 10, what is the greatest possible value of x-yz?
单选题In its search for new technologies for solar
单选题If Whitney wrote the decimal representations for the first 300 positive integer multiples of 5 and did not write any other numbers，how many times would she have written the digit 5?
单选题Is -3 x 3 ?1 x2 + y2 = 92 x2 + y9
单选题If s is an integer, is 24 a divisor of s ?1 Each of the numbers 3 and 8 is a divisor of s. 2 Each of the numbers 4 and 6 is a divisor of s.
单选题Most scholars agree that King Alfred (A.D.
单选题If k is an even integer and p and r are odd integers, which of the following CANNOT be all integer?