题目内容

较易发生先天缺失的恒牙是

A. 上下颌第一磨牙
B. 上下颌第二磨牙
C. 上下颌中切牙
D. 上下颌侧切牙
E. 上下颌尖牙

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根柱是指

A. 尖牙粗壮长大的根
B. 发生分叉的牙根
C. 牙根未分叉的部分
D. 牙根发生分叉之后的部分
E. 截面接近圆形的牙根

上前牙牙根唇面宽于舌面的生理意义是

A. 与牙冠较宽的唇面相延续
B. 抵抗意外碰撞的外力
C. 抵抗向前的力
D. 与牙槽嵴形态相适应
E. 补偿牙弓较大的外径

It is interesting to reflect for a moment upon the differences in the areas of moral feeling and standards in the peoples of Japan and the United States. Americans divide these areas somewhat rigidly into spirit and flesh, the two being in opposition in the tire of a human being. Ideally spirit should prevail but all too often it is the flesh that does prevail. The Japanese make no such division, at least between one as good and the other as evil. They believe that a person has two souls, each necessary. One is the "gentle" soul, the other is the "rough" soul. Sometimes the person uses his gentle soul. Sometimes he must use his rough soul. He does not favor his gentle soul, neither does he fight his rough soul. Human nature in itself is good, Japanese philosophers insist, and a human being does not need to fight any part of himself. He has only to learn how to use each soul properly at the appropriate times. Virtue for the Japanese consists in fulfilling one’s obligations to others. Happy endings, either in life or in fiction, are neither necessary nor expected, since the fulfillment of duty provides the satisfying end, whatever the tragedy it inflicts. And duty includes a person’s obligations to those who have conferred benefits upon him and to himself as an individual of honor. He develops through this double sense of duty a self discipline which is at once permissive and rigid, depending upon the area in which it is functioning. The process of acquiring this self-discipline begins in childhood. Indeed, one may say it begins at birth. Early is the Japanese child given his own identity! If I were to define in a word the attitude of the Japanese toward their children I would put it in one succinct word-" respect". Love Yes, abundance of love, warmly expressed from the moment he is put to his mother’s breast. For mother and child this nursing of her child is important psychologically. Rewards are frequent, a bit of candy bestowed at the right moment, an inexpensive toy. As the time comes to enter school, however, discipline becomes firmer. To bring shame to the family is the greatest shame for the child. What is the secret of the Japanese teaching of self-discipline It lies, I think, in the fact that the aim or all teaching is the establishment of habit. Rules are repeated over, and continually practiced until obedience becomes instinctive. This repetition is enhanced by the expectation of the eiders. They expect a child to obey and to learn through obedience. The demand is gentle at first and tempered to the child’s tender age. It is no less gentle as time goes on, but certainly it is increasingly inexorable. Now, far away from that warm Japanese home, I reflect upon what 1 learned there. What, I wonder, will take the place of the web of love and discipline which for so many centuries has surrounded the life and thinking of the people of Japan According to the passage, people in Japan believe that a child is born______.

A. with two souls which are fighting with each other
B. basically good
C. evil
D. sinful

牙根是指

A. 牙体固定在牙槽窝内的一部分
B. 对牙体起支持作用的部分
C. 被牙骨质所覆盖的牙体部分
D. 被牙本质所覆盖的牙体部分
E. 被牙周膜包裹的牙体部分

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