adult tooth- any of the 32 teeth that replace the deciduous teeth of early childhood and (with luck) can last until old age permanent tooth tooth- hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense ...
百度试题 结果1 题目The greater part of the tooth consists of ___C___. A. pulp B. enamel C. dentine D. cementum 相关知识点: 试题来源: 解析 C. dentine 反馈 收藏
Define neck of tooth. neck of tooth synonyms, neck of tooth pronunciation, neck of tooth translation, English dictionary definition of neck of tooth. n. 1. Anatomy a. The part of the body joining the head to the shoulders or trunk. b. A narrow or constri
百度试题 结果1 题目The crown of the tooth is covered by a layer of _,which is the hardest substance in the body. A. pulp cavity B. dentin C. pulp D. enamel 相关知识点: 试题来源: 解析 D 反馈 收藏
toothlike ˈtüth-ˌlīk adjective Illustration of tooth A outside of a molar 1 crown 2 neck 3 roots B cross section of a molar 1 enamel 2 dentin 3 pulp 4 cementum 5 gum C dentition of adult human (upper) D dentition of adult human (lower) 1 incisors 2 canines 3 bicuspids ...
The hard, {{U}}out{{/U}} surface of the tooth is called enamel. A.outsideB.appearanceC.outerD.hiding 答案 C[分析] 形容词应用。 outside和outer均有“外部的”意思。但outside一般指物体的外表或表面,而outer指一种相对性,即相对于内部而言的外部或外表, appearance外貌,外观,hiding隐匿:在此指牙...
Natural ivory is a bone-like material largely made of a mineral called dentine, which lies underneath the enamel of a tooth. And whilst human teeth are used for eating, ivory tusks are teeth that have emerged beyond the lips, giving elephants an evolutionary advantage. ...
1. The roof of the mouth is known as the( ) 答案:palate 2. The crown of the tooth is covered by a layer of___ , the hardest substance in the body.( ) 答案:enamel 3. The ileum connects to the colon through a sphincter called the valve. 答案:ileocecal 4. Which of the followin...
百度试题 题目Enamel, the hardest substance in a human being's body, covers the entire crown of the tooth.() A. whole B. inseparable C. superficial D. main 相关知识点: 试题来源: 解析 A 反馈 收藏
Enamel— the outermost layer of the tooth. Enamel is the hardest, most mineralized tissue in the body — yet it can be damaged by decay if teeth are not cared for properly. Dentin— the layer of the tooth under the enamel. If decay is able to progress its way through the enamel, it...