由于对旧义齿不适造成的黏膜增生,应首先采取的措施是
A.服用抗生素
B.停戴旧义齿
C.含漱口水
D.手术切除增生黏膜
E.都不对
参考答案:B
关于抗原,下列组合错误的是 ()
A.核抗原-DNA
B.自身抗原-HLA
C.完全抗原-ABO血型抗原
D.线粒体抗原-AMA
E.异嗜性抗原-Forssman抗原
What is the point the speaker is trying to make about technology development
A.A mature technology requires less innovation.
B.Technical evolution is close to maturation in certain fields.
C.New types of energy are expected to mature in the near future.
D.Nanomaterials or photonics and carbon nanotubes are environmentally friendly.