Enamel, the hardest substance in a human being’s body, covers the entire crown of the tooth.

admin2012-07-29  43

问题 Enamel, the hardest substance in a human being’s body, covers the entire crown of the tooth.

选项 A、whole
B、inseparable
C、superficial
D、main

答案A

解析 整个
转载请注明原文地址:https://kaotiyun.com/show/fKmd777K
0

随机试题
最新回复(0)