优势茵是牙龈卟啉单胞菌的牙周疾病是（） A.健康牙周 B.牙龈炎 C.慢性成人牙周炎
题型：单项选择题
问题：
优势茵是牙龈卟啉单胞菌的牙周疾病是（）
A.健康牙周
B.牙龈炎
C.慢性成人牙周炎（慢性牙周炎）
D.Down综合征
E.局限型侵袭性牙周炎
题型：单项选择题
阅读短文，从方框中选择适当的单词填空。（每词限用一次）
It was a (1) ___________ day during the summer holiday. My mother and I got on the bus to my grandma’s village. It was (2) ___________ dry that I was really thirsty. I began to think of the sweet watermelons and other (3) ___________ in Grandma’s house. I could hardly wait to arrive there.
(4) ___________ took us two hours to get there . Grandma brought out a big watermelon and cut it. It was nice to eat the watermelon (5) ___________ such a hot day.