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【多选题】
患儿，男性，8岁，要求矫治“地包天”。无全身性疾病治疗史。幼儿园有牙痛史但未作治疗。有长期吮咬上唇习惯，有奶瓶喂养史。替牙列，上下第一磨牙萌出，上下前牙已替换，前牙反 ，凹面型，下颌第二乳磨牙残根。 如对患儿采用矫治器促进上颌骨向前生长，同时抑制下颌骨的生长，下面哪些描述是正确的（）A.
可采用改良颏兜前牵引矫治器
B.
可采用面罩前牵引矫治器
C.
可采用单纯颏兜矫治器
D.
可先采用FR-Ⅲ矫治器
E.
可采用上颌 垫式矫治器
F.
可采用肌激动器
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举一反三
【简答题】check-ou time
【简答题】在产品生命周期的()期,竞争最激烈。
【单选题】According to the passage, it now costs ￡9______.
A.
for three licenses
B.
for a full license
C.
for temporary license
D.
for two license
【单选题】紧急后退三。
A.
Full astern！
B.
Double full astern！
C.
Emergency full astern！
D.
Emergency three astern！
【多选题】Which three statements are true about the operation of a full-duplex Ethernet network, which is being used in the Ezonexam LAN? (Choose three)
A.
Ethernet hub ports are preconfigured for full-duplex mode.
B.
The host network card and the switch port must be capable of operating in full-duplex mode.
C.
There are no collisions in full-duplex mode.
D.
In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
E.
A dedicated switch port is required for each full-duplex node.
【简答题】数据表的修改与删除操作：“雇员管理系统”(gygl)中有三个表,结构如下：部门表dept（部门编号did，部门名称dname），雇员表emp（雇员编号eid，姓名ename，性别 ，职称title， 出生日期birthday, 所在部门编号did） ， 工资表salary（雇员编号eid，基本工资base_gz，职务工资title_gz，扣除kc）。向部门表中添加“部门简介”字段，字段名为m...
【简答题】A．Many hours. B．One full day. C．Two full days. D．Three full days.
【单选题】Full_________ to looking after three children at home, she no longer has time to enjoy the various activities in the club.
A.
attached
B.
occupied
C.
contributed
D.
devoted
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