问题
单项选择题
初戴全口义齿,前伸牙合时,后牙接触而前牙不接触,这时应调磨
A.上后牙牙尖的近中斜面或下后牙牙尖的近中斜面
B.上后牙牙尖的近中斜面或下后牙牙尖的远中斜面
C.上后牙牙尖的远中斜面或下后牙牙尖的远中斜面
D.加长下前牙
E.上后牙牙尖的远中斜面或下后牙牙尖的近中斜面
答案
参考答案:E
初戴全口义齿,前伸牙合时,后牙接触而前牙不接触,这时应调磨
A.上后牙牙尖的近中斜面或下后牙牙尖的近中斜面
B.上后牙牙尖的近中斜面或下后牙牙尖的远中斜面
C.上后牙牙尖的远中斜面或下后牙牙尖的远中斜面
D.加长下前牙
E.上后牙牙尖的远中斜面或下后牙牙尖的近中斜面
参考答案:E
In the past,people usually believed what newlyborn babies wanted was food and to be kept warm and dry.They thought babies were not able to ____ things until they were five or six months old.____ the researchers in the United States now believe babies begin learning on their first ____ of life.They say babies are strongly ____ by their environment and one baby will ____ if his or her mother does something that the baby likes. A baby learns to get the best care possible by smiling to ____ her mother.This is how babies start to learn to ___ and communicate with other people.The researchers say this ability to learn ___ in a baby even before birth.They also ____ the idea that newlyborn babies can ____ and understand sounds they heard while they were still ____ inside their mothers. Recently,an American study ____ 112 babies found babies learned better when they were ____.The babies appeared to learn well whether they were sitting up on their own,sitting in seats or __ to sit up.The researchers say keeping that kind ____ had what they called a ____ effect on the babies' ability to learn about objects.They say the body position may be linked to development in the ____.One ____ says babies can pay more attention to ___ an object if they do not have to be worried about their balance.
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