皮皮学，免费搜题
登录
搜题
【单选题】
下面哪项不是矫治器应具备的性能（）A.
对口腔及颌面软硬组织无害
B.
舒适，较少影响口腔各种功能及美观
C.
不影响口腔卫生，不受唾液影响
D.
发挥作用力部分便于调整，矫治力大小可以控制但方向不易控制
E.
结构尽可能简单，易于操作
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Winter is a very special time in Northern Norway. Winter also means skiing, and Narvik can offer some of the best skiing in Norway. The view and light change frequently and no two days are the same. F...
【简答题】If you don’t keep yourself warm enough, winter can be a time of illness. During the winter months, people easily get colds and flu (流感). Many think they are the same, but these two illnesses are diffe...
【简答题】According to the passage, a winter midnight is most probably the time for ______.
【简答题】促进有效排痰的方法有哪些
相关题目：