当用25ml移液管移取溶液时，应记为（）ml。
A.25.0
B.25
C.25.00
参考答案：A
Mr Li _____ the students' work when I entered his room. [ ]
A. goes over
B. went over
D. is going over
D. was going over
对于需要国家重点扶持的高新技术企业，减按（）的税率征收企业所得税。
A.12％
B.15％
C.20％
D.25％
