关于正畸治疗中的牙根吸收的原因与影响因素，下列正确的是（）

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问题单项选择题

A.男性患者牙根吸收的发生率和严重程度比女性高

B.儿童患者易发生根吸收

C.成人患者很少发生根吸收

D.下颌牙齿比上颌牙齿容易发生根吸收

E.前牙比后牙更易发生根吸收

答案

参考答案：E

选择题

The primary school is in poor ______, which worries many parents and teachers.

A．state

B．situation

C．condition

D．position

选择题

When _______ America and Britain, this famous writer said that the same language _____ the two people.

A．talking of; separates

B．talked of; separated

C．talking; separates

D．talks; separates