挥发性碱基总氮用于鉴定( )。 A．脂肪酸败 B．蛋白质腐败 C．蔬菜的腐败

阅读理解。

     No one can fail to stand in awed (令人敬畏的) admiration of the great discoveries of history-Newton's

laws of motion, Kepler's principles of planetary movement, Einstein's general theory of relativity. Equally

awe-inspiring are artistic creations in painting, theatre, music, and literature, which have also been brought

about by discovery through personal efforts. What do these extraordinary achievements of well-known

scientists and artists have to do with problem solving?

     A great scientific discovery or a great work of art is surely the result of problem-solving activity. The

solution to a problem, we are told, often comes to thinkers in a "flash of insight (顿悟)", although they may

have been turning the problem over in their minds for some time. As a particular form of problem solving,

these creative acts are based on the broad knowledge gained in the past, whether this be of the " public" sort

known to science, or of the "private" sort known to the artist.

     Many creative thinkers state that they have completely devoted themselves to the subject matter of the

problem, often over fairly long periods of time. Indeed, it would be strange if they had not done this.

Nothing in such statements supports the idea that there is anything very different about the problem solving

that leads to discoveries of the great contributions to the society. The act of discovery, even in the relatively

predictable (可以预见的) sense that it occurs in everyday learning, involves (涉及) a " sudden insight"

which changes the problem situation into a solution situation. As we have seen, everyday discovery also

0requires that the learner have the knowledge of the rules gained in the past, which is involved in the solution.

1. Newton, Kepler and Einstein are mentioned in the first paragraph to _____.

A. bring about the subject of the discussion

B. explain that scientists are more creative

C. show the difference between science and arts

D. prove that arts require more personal efforts

2. While knowledge from the past plays an important role in their achievements, thinkers

sometimes also depend on their _____.

A. artistic tastes

B. sudden insight

C. admiration of discoveries

D. scientific experiments

3. What does the underlined word " this" refer to?

A. Great contributions to the society.

B. Long-time study of the subject matter.

C. Various statements about problem solving.

D. Complete devotion to artistic creation.

4. We may conclude from the passage that _____.

A. it is more likely to make scientific and artistic discoveries in everyday learning

B. a sudden insight and knowledge from the past are required in making discoveries

C. scientific discoveries or artistic creations are usually unpredictable in nature

D. knowledge of the rules in the past is often developed in the changes of situation

公安机关在办理刑事案件中，必须重证据，重调查研究，犯罪嫌疑人的口供也可单独作为证据使用。 ( )

甲公司20×7年1月1日以6000万元的价格购入乙公司30%的股份，另支付相关费用30万元。购入时乙公司可辨认净资产的公允价值为22000万元(假定乙公司各项可辨认资产、负债的公允价值与账面价值相等)，双方采用的会计政策、会计期间相同。乙公司20×7年实现净利润1200万元。甲公司取得该项投资后对乙公司具有重大影响。假定不考虑其他因素，该投资对甲公司20×7年度利润总额的影响为( )万元。

A．330
B．870
C．930
D．960

民间统计组织是指由社会团体、科研院所、大专院校以及民间咨询和信息机构所建立的社会经济调查机构。( )