一个长方形花坛长5米,宽3米,这个长方形的周长是______米.
(5+3)×2,
=8×2,
=16(米),
答:这个长方形的周长是16米.
故答案为:16.
根据所给汉语提示写单词。
1. I with my family often go to the _________ (餐馆) to have dinner at weekends.
2. Do you like listening to _________ (音乐)?
3. This football player is good at _________ (得分).
4. Can I _________ (借) your rubber ?
5. My _________ (祖父母) live with us in a flat.
牙周膜由牙胚的哪部分形成()
A.成釉器
B.牙蕾
C.牙囊
D.牙板剩余
E.牙 * *