以下是某商场各楼层商品分布平面图，仔细观察并用适当的词语填空。

             STORE DIRECTORY

1. There are _________ floors in the shop.

2. You can find the skirts on the _________ floor.

3. While shopping, you can have meals in the _________ on the third floor.

4. You're looking for a hat for your father, you should go to the _________ on the first floor.

5. Children's Clothing is on the _________ hand side on the second floor.

牙本质龋损在光镜下可看到微生物渗透至牙本质小管的区域是（）

A.坏死区

B.感染层

C.牙本质脱矿区

D.硬化区

E.修复性牙本质层