（x2+2）（1x2-1）5的展开式的常数项是（ ） A．-3 B．-2 C．2 D．3

分析北半球某地的天气系统示意图，回答问题。

（1）图中的高低气压中心：C为________气压中心，D为________气压中心。

（2）气流的垂直运动方向：C处__________气流，D处__________气流。气流的水平运动方向： C处气

    流呈____时针方向辐散；D处气流呈____时针方向辐合。

（3）图中的风向：A地偏________风，B地偏________风。

（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。

硝苯地平治疗心绞痛的作用机制是（）

A.通过抑制钙离子进入冠脉、周围血管壁平滑肌细胞内而扩张冠脉及周围血管

B.抑制血小板聚集

C.减慢心率、降低心肌收缩力、减少心肌耗氧量

D.扩张冠脉及外周血管，减轻心脏负担

E.改善心肌营养与代谢

流转税额包括( )。

A．增值税

B．营业税

C．消费税

D．资源税

E．财务所得税

下列对“教学”的描述正确的是（）

A.教学即传道、授业、解惑

B.教学就是引导学生“试误”

C.教学是教师的教和学生的学两个独立的过程

D.教学的本质是交往互动

Personality is to a large extent inherent. A-type parents usually (1) A-type offspring. But the environment must also have a profound effect (2) if competition is important to the parents, it is (3) to become a major factor in the lives of their children.

One place where children (4) A characteristics is school, which is, (5) its very nature, a highly competitive institution. Too many schools (6) the "win at all costs" moral standard and measure their success by sporting achievements. The current (7) for making children compete against their classmates or against the (8) produces a two-layer system, in which competitive A types seem in some way better than their B type fellows. Being too (9) to win can have dangerous consequences: remember that Pheidippides, the first marathon runner, (10) dead seconds after saying. "Rejoice, we conquer!"

(11) the worst form of competition in schools is the disproportionate emphasis on examinations. There is, for example, a (12) school that allows pupils to concentrate on those things they do well. The (13) of competition by examination are somewhat questionable, but competition in the certain (14) of failure is positively harmful.

(15) , it is neither practical nor desirable that all A youngsters change into B’s. The world needs types, and schools have an important duty to try to (16) a child’s personality to his possible future employment. It is top management.

If the preoccupation of schools with academic work was (17) , more time might be spent teaching children surer values. Perhaps selection (18) the caring professions, especially medicine, could be made less by good grades in chemistry and more by such (19) as sensitivity and sympathy. It is surely a mistake to choose our doctors exclusively from A type stock. B’s are important and should be (20) .

19（）

A.judgments

B.assumptions

C.considerations

D.estimates