多项选择题

选择培养基的原则是。
A、目的明确
B、营养协调
C、物理化学条件适宜
D、以粗代精、以废代好、以简代繁

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女性,35岁,便血伴排便不尽感半个月,既往有内痔病史,首选的检查方法为 A. 粪便潜血实验 B. 直肠镜检 C. 直肠指诊 D. 结肠镜检 E. 钡剂灌肠检查

单项选择题

Chapter 1 identifies common reasons for creating technical documents. Which reason in the following list is NOT mentioned in the chapter? A. to help others carry out a task B. to change attitudes about a technology or an issue C. to establish common knowledge in the marketplace D. to help others make a decision

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