
牙龈癌()
A.最常见的口腔癌
B.原发于口底黏膜的癌
C.以基底细胞癌多见
D.来自牙胚成釉上皮的剩余细胞
E.大多对放疗不敏感


A.最常见的口腔癌
B.原发于口底黏膜的癌
C.以基底细胞癌多见
D.来自牙胚成釉上皮的剩余细胞
E.大多对放疗不敏感
2.如果体系的计算自由度小于或等于零,那么体系一定是几何不变体系。( )
Fill in the blanks with the correct forms of the words in the box.
1.She did a _____________ in her new skirt.
2.The old street lights were _____________ by more energy-efficient models.
3.Why is it so _____________ important to ancient Egyptian art?
4.How much do your kindergarten teacher and classmates _____________ the rest of your life?
5.Tom is eager to _____________ in the city’s cultural life.
6.We can’t _____________ to wait any longer or we’ll miss the plane.
7.He could _____________ all the teachers’ accents.
8.They _____________ two children from Nicaragua.
9.You need _____________ fingers for that job.
10.Chris is _____________ to go around the world.