将社会科学想象成一种()的工具,凡举重大问题的一切真实解答都必须仰赖人类觉醒的层次。
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在参数估计中,要求通过样本的统计量来估计总体参数,评价统计量的标准之一是指使它与总体参数的离差越小越好。这种评价标准称为()。
A. 无偏性
B. 有效性
C. 一致性
D. 充分性
Banked ClozeDirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in the word bank. Each choice in the bank is identified by a letter. Please fill in the banks with the letter. You may not use any of the words more than once.University students come from different parts of the country with various purposes. However, a closer look at their reasons for studying at the university will enable us to 1)______them roughly into three groups: those who have a(n) 2)______for learning, those who wish to 3)______a bright future, and those who learn with no definite purpose.Firstly, there are many students who learn simply because they 4)______their goal of learning. Some read a wealth of British and American novels because they are keenly interested in literature. Others sit in front of the computer screen, working on a new program, 5)______day and night, because they find some computer programs 6)______, and they dream of becoming a "Bill Gates" one day.Secondly, there are students who work hard mainly for a better and more 7)______future. It seems that the majority of students fall into this group. After admission to the university, they read books after books to 8)______knowledge from all of the resources which are 9)______to them, and finally, to succeed in the future job market.Thirdly, there are still some students who learn without a clear goal. They take courses, finish homework, enjoy life on campus, but don't want to 10)______anything new or challenging. They have no idea what they will be doing after college. And they may end up with nothing in their lives.
表压力是 ()
A. 绝对压力
B. 相对压力
C. 真空度
D. 都不是