单选题Microbiologist: A lethal strain of salmonella
单选题If x and y are positive integers, what is the value of y?121x+20y=5002x+y=24
单选题What is the perimeter of a rectangle having an area of 105?1The length is greater than twice the width.2The length and width of the rectangle are both integers greater than 5.
单选题Many office buildings designed to prevent
单选题Conventional wisdom suggests vaccinating elderly
单选题What is the value of a?1a2+a-12=02|a|＞2
单选题Does the line L pass quadrant IV？1The slope of L is negative.2y-intercept of line L is-5.
单选题一个销售员以$100买进了一件夹克，他设定卖价等于在买价的基础上加上50％的卖价；在销售这件夹克的时候，这个人又在卖价的基础上打2折出售，那么这个销售员的净利润是多少?
单选题Historian: Newton developed mathematical
单选题Since 1990 the percentage of bacterial sinus
单选题一个长方体形木盒子的长、宽、高分别为6，8，10；一个圆柱形罐头被放置在长方体形盒子中，问在所有的罐头中有最大体积罐头的底面半径是多少?
单选题If a and b are integers and a-b=8, thena+b CANNOT be
单选题What is the number of integers that are common to both set S and set T? 1 The number of integers in S is 7，and the number of integers in T is 6. 2 U is the set of integers that are in S only or in T o
单选题Is the perimeter of a certain rectangular garden greater than 50 meters?1 The two shorter sides of the garden are each 15 meters long. 2 The length of the garden is 5 meters greater than the width of
单选题From 1973 to 1986, growth in the United States
单选题What is the tens digit of integer x?1The remainder is 30 when x is divided by 100.2The remainder is 30 when x is divided by 110.
单选题A merchant paid $300 for a shipment of x identical calculators．The merchant used two of the calculators as demonstrators and sold each of the others for ＄5 more than the averagearithmetic meancost of
单选题如果将小数0.123456789101112…无限不循环地把所有整数都列出来，那么小数点后第100位的数字是多少?