致密下层中锚原纤维的主要成分是()
A.Ⅳ型胶原
B.Ⅲ型胶原
C.Ⅶ型胶原
D.Ⅷ型胶原
参考答案:C
填空
l. I want _____( go) to play football.
2. I know she's not _____( go) to get into trouble.
3. Why _____( not tell) him the fact?
4. —Let's go _____( shop).
—No,not today.
5. —Shall we_____( talk) about these cars?
—Sure.
6. I think the_____( cool) thing is that they trust me.
升华后烟丝含水率为()。
A.2%--6%
B.4%--8%
C.6%--10%
D.8%--12%