题目内容

UNICEF says Iraqi children frequently were caught in the _____in 2007. It reports hundreds of children lost their lives or were injured by _and many more had their main family wage earner _or killed. More than one million people are _____in Iraq. About one half of them are children. Lisa Schlein for VOA news Geneva.

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4.在各种口腔黏膜中哪种黏膜下层不明显

A. 颊黏膜
B. 唇黏膜
C. 舌腹黏膜
D. 口底黏膜
E. 软腭黏膜

3.唇红部组织的特征是

A. 上皮无角化
B. 固有层结缔组织乳头狭长，含有毛细血管袢
C. 含有丰富的粘液腺
D. 偶尔会有皮脂腺
E. 含有明显的粒细胞层

2.口腔黏膜增龄变化描述哪项是错误的

A. 上皮萎缩变薄
B. 小涎腺发生萎缩
C. 丝状乳头数量增加
D. 叶状乳头增生
E. 黏膜感觉功能下降

7.下述黏膜组织中，何处无黏膜下层

A. 唇
B. 口底
C. 舌腹
D. 牙龈
E. 颊