【单选题】【消耗次数：1】
替牙牙合时期为（）
①
2～6岁
②
2.5～6岁
③
6～12岁
④
9～12岁
⑤
6～15岁
参考答案：
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相关题目
【单选题】
6～12岁之间为替牙牙合期，常出现暂时性错牙合的表现，其中不包括（）
①
上唇系带位置过低
②
上中切牙间隙
③
上切牙牙冠偏远中
④
暂时性远中牙合
⑤
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4～6岁期间，乳牙牙合的特征是（）
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出现灵长间隙
②
牙的切缘及牙合面产生磨耗
③
上下颌第二乳磨牙远中面不在一个平面，下颌第二乳磨牙移至上颌第二乳磨牙的近中
④
随着下颌支的发育，暂时性深覆牙合可有所减小
⑤
以上都对
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①
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②
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②
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③
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④
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⑤
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随机题目
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①
By now
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As usual
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So far
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At most
【单选题】
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I have no idea
②
No, no. I can carry it myself
③
That’s a good idea
④
Thank you. I can manage myself
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①
under
②
by
③
of
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with
【单选题】
They talked in whispers, but still, I couldn’t help but __________ their conversation.
①
overhear
②
to overhear
③
overhearing
④
overheard
【单选题】
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①
It’s nothing at all
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Oh, never min
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It doesn’t matter
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⑤
There are no questions
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①
contribute
②
promote
③
refer
④
matter
【单选题】
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①
at heart
②
in person
③
on purpose
④
by nature
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①
from those
②
from that
③
from that one
④
from those ones
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①
began
②
begin
③
should begin
④
have begun