【单选题】【消耗次数：1】
ETA矫治器的功能不包括（）
①
改善面型
②
调节口肌肉
③
破除不良口腔习惯
④
减缓牙弓扩大
⑤
促进颌骨发育
参考答案：
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相关题目
【单选题】
关于无托槽矫治器的优点叙述有误的是（）
①
透明压膜矫治器，满足了成人患者的美观要求。且不存在托槽或弓丝损坏刺激软组织等情况
②
患者可以自行摘戴矫治器,日常生活不受托槽和弓丝的影响
③
隐形矫治器还可起到护齿器及夜磨牙牙合垫保护关节的作用
④
与传统矫治器相比，没有在每个牙齿的表面粘接托槽，更有利于保持口腔卫生
⑤
材料并非惰性材料，温度、湿度以及生物酶均可对其回弹性、韧度和脆性等物理性状产生影响
随机题目
【单选题】
___ I saw the computer, I showed great interest in it.
①
At first
②
For the first time
③
Until
④
The first time
【单选题】
He speaks English ___ he speaks his mother tongue.
①
so good as
②
as good as
③
so well as
④
as well as
【单选题】
I often visited Tian’an Men Square ___ I was staying in Beijing.
①
until
②
during
③
while
④
throughout
【单选题】
Ladies and gentlemen, please fasten your seat belts. The plane __________.
①
takes off
②
ia taking off
③
has taken off
④
took off