起于牙槽嵴顶，呈放射状止于釉骨质界下方的牙骨质的为（）
A.牙槽嵴组
B.水平组
C.根尖组
D.越隔组
E.斜行组
参考答案：A
Translate the Chinese in the brackets into English to complete the sentence. (根据括号中的
汉语意思完成句子。)
1. __________ (不)you nor he was late for school.
2. I like to eat__________ (饺子).
3. Three__________ (四分之三)of the students want to go boating.
4. In fact, he is __________ (勇敢)than me.
5. There are four__________ (季节) in a year.
人类是由_____________________经过千百万年逐步演变和进化而来的。[ ]
A．类人猿
B．古化石
C．古猿
D．海洋生物
