教育学校考试概念:学生手持铅笔进行考试,书写答题表或练习,在大学教室参加填报入学考试,多张碳纸电脑,Education school test concept : Hands student holding pencil for testing exams writing answer sheet or exercise for taking fill in admission exam multiple carbon paper computer at university classroom
商业,Business, Technology, Internet and network concept. Young businessman working on a virtual screen of the future and sees the inscription: Exam results
用于工业冶金电子科学等实验室质量控制的样品或试样检验中的现代高精度显微镜,modern & high accuracy microscope during sample or specimen inspection for quality control in industrial metallurgy electronic science etc of laboratory