分析某地的天气系统示意图，依次回答：（每空1分，共10分）
（1）图中的高低气压中心：C为 ，其天气情况： 。
（2）气流的垂直运动方向：D处 气流。
（3）比较A、B两点的气压值大小 ，A地偏 风，B地偏 风。(南或北)
比较A、B两点的风力大小 ，原因 。
（4）图中的冷、暖锋雨区位置：冷锋雨区位置在（甲乙丙丁中的） 地，暖锋雨区位置在（甲乙丙丁中的） 地。
本题考查等压线图示的综合分析。（1）直接根据图示的气压分布判断，C地中心气压较四周高，故判断为高压中心，中心盛行下沉气流，天气晴朗。（2）图示D处中心气压较四周低，故判断为低压中心，中心气流上升。（3）直接根据图示A、B两地的等压线位置可判断，A点气压低于B点，根据等压线分布可画出风向，风向斜穿等压线，由高压指向低压。A处等压线较B处密，故风力较大。（4）直接根据图示甲地的锋面性质进而判断两侧的气团性质，锋面雨区总在冷气团一般，不判断，冷锋雨区在甲处，暖锋雨区在丁处。
Directions: There are 4 passages in this part. Each of the passages is followed by ,5 questions or unfinished statements. For each of them there are 4 choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.
Passage One
| In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic (运动的) molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion. A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists’ predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected. Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves are not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science anymore than a pile of bricks can be called a house. " Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hypothesis is a leap into the unknown. It extends the scientist’s thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories. |
According to the second paragraph, a useful theory is one that helps scientists to ______.
A．observe events
B．find errors in past experiments
C．make predictions
D．publicize new findings