Which of the following variables was kept constant in Study 2 ?

单项选择题According to Figure 2, which of the following statements best describes the relative amplitudes of the first p-waves to arrive at the seismograph and the first s-waves to arrive at the seismograph? The amplitude of the first p-waves to arrive at the seismograph is:

单项选择题Based on Fact 5 and Student 1’s discussion, which of the 3 stars in the Algol system, if any, was most likely the first to become an MS star?

单项选择题Study 1 differed from Study 2 in which of the following ways?

单项选择题Patrons at a certain restaurant can select two of three appetizers—fruit, soup, and salad—along with two of three vegetables—carrots, squash, and peas.What is the probability that any patron will select fruit, salad, squash, and peas?

单项选择题According to Figure 3, at Sites 1, 2, and 3, the smallest δ18O value of the groundwater in the lake clay was recorded at a depth between:

单项选择题Which of the following integers is the closest to the value for the unit length of one leg of a triangle with hypotenuse 13,if the other leg is 7 units long?

单项选择题A certain cube contains 125 cubic inches.What is the surface area, in square inches,of each square face of the cube?

单项选择题Events A, B, and C occur every 5 days,3 days, and 8 days, respectively. What is the number of days after events A, B, and C all occur on the same day that they all occur again for the first time on the same day?

单项选择题Figure 1 indicates that as depth increases, pressure:

单项选择题What is the least common denominator for adding the fractions 4 15,1 12, and 3 8?