位于上领硬区两侧:与牙弓平行,离开龈缘 4~6mm
A.侧腭杆B.后腭杆C.前腭杆D.舌杆E.腭板
参考答案:A
书面表达。
Write at least 60 words about the topic "I want to do something for my school".
(以“我想为学校做件事”为题写一篇不少于60个词的短文,标点符号不占格)
Use the following points as a reference(以下内容仅供参考):
1. What do you want to do for your school?
2. Why do you want to do it?
3. How are you going to do it?
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下列不属于既得权益特征的是()。
A.在符合特定条件或履行特定义务后方可获取
B.存在风险
C.属于当期支付
D.具有法律或合同依据