搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列关于股骨头骨骺缺血坏死的X线表现的描述中，哪一项对早期诊断有十分重要的价值( )。

A．骨质硬化
B．骨发育迟缓
C．关节间隙增宽
D．骨骺变扁、骨折线和节裂
E．软骨下半月征

答案

参考答案：E

解析： 软骨下半月征对股骨头骨垢缺血坏死的早期诊断具有十分重要的价值。

改错题

下面短文中有10处语言错误, 每句中最多有两处。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1.每处错误及其修改均仅限一词。

2.只允许修改10处，多者（从第11除起）不计分。

Li Ming and Li Juan study hardly in a high school. They do extremely well all the

subjects. Li Juan decides to attend in Sichuan University while Li Ming preferred Beijing University. It makes them differ from the most students is that they don’t go to school. In fact, they have never been to school. Since kindergarten, we have studied at home. Neither of them feels they have missed anything by taught at home all the time. Like many people received home schooling in Chengdu, and they feel they are lucky.

查看答案
选择题

钢铁发生吸氧腐蚀时，正极上发生的电极反应是 ( )

A．2H++2e－=== H2

B．Fe2++2e－=== Fe

C．2H2O+O2+4e－=== 4OH－

D．Fe3++e－=== Fe2+
查看答案