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【单选题】
关于乳牙嵌入，下列描述正确的是A.
乳牙嵌入后都不应该立刻拔除
B.
如果牙冠偏向唇侧，应该立刻拔除
C.
乳牙嵌入后应该立刻拉出复位
D.
如果乳牙牙根与牙槽骨粘连不能自行萌出，应该正畸牵引乳牙，使之萌出
E.
乳牙嵌入后都会损伤到年轻恒牙胚
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举一反三
【单选题】The phenomenon that words sharing the same meaning is called______.
A.
hyponymy
B.
synonymy
C.
polysemy
D.
homonymy
【单选题】The World Web is often called WWWor the Web _______
A.
for short
B.
in short
C.
by short
D.
shortened
【单选题】An aspirated [p] in pit and an unaspirated [p] in sport can be called __________ of the phoneme /p/.
A.
analogues
B.
tagmemes
C.
morphemes
D.
allophones
【单选题】In some countries, ______ is called 'equality' does not really mean equal rights for all people.
A.
which
B.
that
C.
what
D.
one
【单选题】Fluency activities usually form. what is called the ________ stage of the lesson.
A.
preparation
B.
ending
C.
revision D production
【单选题】The way that the osmotic pump pill works is based on a process called______.
A.
synthesis
B.
pressure
C.
cellulose
D.
osmosis
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