The number of books in the bookshop is about 10,000 and a number of them

     about science.

A．is

B．was

C．are

D．Were

肾上腺皮质激素类药物局部注射可用于治疗

A．结核性溃疡

B．雪口病

C．腺周口疮

D．疱疹性口炎

E．以上均不对