检索关键字为CPU的500字的文章,年限为2015-2019.写出检索的步骤

A、Transmission routes of 2019-nCoV and controls in dental practice

B、Analyzing the epidemiological outbreak of COVID-19: A visual exploratory data analysis approach

C、Coronavirus disinfection in histopathology

D、Immunoinformatics-aided identification of T cell and B cell epitopes in the surface glycoprotein of 2019-nCoV

E、The 2019 Novel Coronavirus (2019-nCoV): Novel Virus, Old Challenges

B.检索标识

C.检索方式

D.检索时间

A. 检索策略

B. 检索标识

C. 检索方式

D. 检索时间

此题为判断题(对，错)。

A. 自由词检索

B. 序号检索

C. 缺省检索

D. 题名检索