问题 单项选择题 B1型题

前牙缺失,牙槽嵴丰满,倒凹大,观测模型时应()

A.向后倾斜

B.向前倾斜

C.向左倾斜

D.向右倾斜

E.不倾斜

答案

参考答案:A

解析:在模型分析时,一侧牙缺失,而对侧余留牙舌侧倒凹大,可将模型向有牙侧倾斜,义齿从缺牙侧向有牙侧就位。当远中为游离端或近中基牙的倒凹明显大于远中基牙时,将模型向前倾斜,选择从后向前的斜向戴入方向,采用调凹法。前牙缺失时一般将模型向后倾斜,选择由前向后的斜向戴入方向,采用调凹法,适当保留前牙唇侧的倒凹,有利于美观。

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

When we think about happiness, we usually think of something extraordinary, a pinnacle (顶点) of sheer (纯粹的) delight. And those pinnacles seem to get rarer the older we get.

 1   I remember playing police and robbers in the woods, getting a speaking part in the school play. Of course, kids also experience lows, but their delight at such peaks of pleasure as winning a race or getting a new bike is unreserved.

For teenagers, or people under 20 the concept of happiness changes.   2   I can still feel the pain of not being invited to a party that almost everyone else was going to. I also remember the great happiness of being invited at another event to dance with a very handsome young man.

In adulthood the things that bring great joy—birth, love, marriage—also bring responsibility and the risk of loss.   3   For adults, happiness is complex.

 4   But I think a better definition of happiness is “ the ability to enjoy something”. The more we can enjoy what we have, the happier we are. It's easy to overlook the pleasure we get from loving and being loved, the company of friends, the freedom to live where we please, even good health.

While happiness may be more complex for us, the solution is the same as ever. Happiness isn't about what happens to us; it’s the ability to find a positive for every negative, and view a difficulty as a challenge.   5  

A.Love may not last; loved ones die.

B.For a child, happiness has a magic quality.

C.Happiness is the meaning and the purpose of life.

D.Being happy doesn’t mean that everything is perfect.E. The dictionary defines “happy” as “lucky” or “ fortunate”.

F. It's not wishing for what we don't have, but enjoying what we do possess.

G. Suddenly it’s conditional on such things as excitement, love, and popularity.

多项选择题