【单选题】Nearly 50 years ago there were
five major types of sources of power that could be exercised. All but one of the following is part of that group. Which one is not?
【单选题】Nearly 50 years ago there were five major types of sources of power that could be exercised. All but one of the following is part of that group. Which one is not?
【简答题】It is said that in England death is pressing, in Canada inevitable and in California optional. Small wonder. Americans' life expectancy has nearly doubled over the past century. Failing hips can be r...