等液人手 Demonstation 5“ Escherichia coli(gram stain, oil 100 X) 大肠埃希菌(革兰染色,油镜100×) MEDICAL MICROBIOLOGY EXPERIMENT 1 Wang YuyanMEDICAL MICROBIOLOGY EXPERIMENT 1 Wang Yuyan Demonstation Escherichia coli (Gram stain, oil 100 ) 100 ) × 大肠埃希菌（革兰染色，油镜 ×