Directions: In the following questions, choose the best answer from the five choices listed.

A number x is chosen at random from the set of positive integers less than 10. What is the probability that（）

 

单项选择题The passage addresses which of the following consequences of terraforming（）

A. The creation of a more hospitable planet.
B. The risk of overpopulation.
C. The elimination of suitable environments.
D. The depletion of the atmosphere.
E. The production of greenhouse gases.

单项选择题In 1995 the number of students enrolled in public institutions of higher education was approximately how many times the number of students enrolled in private institutions of higher education（）

A. 2
B. 2.5
C. 3
D. 3.5
E. 4