题目

词汇；根据中文，句意及英文释义写出单词。 1. We often go to the ____________（剧院）to watch plays and shows. 2. —What are those?    —Oh, they are my father’s _____________（私人的）papers. 3. There is a rapid _____________ (a rise in amount, numbers) in populatin in that country. 4. Some _____________(a person who rides in a car, bus, train, etc, but doesn’t drive it) can’t wait to get on the bus when it arrives at the stop. 5. The old man doesn’t have a wife or children. He lives ___________.根据你所学的知识，回答下列问题．若培养芽孢菌，配制固体培养基的基本步骤是：称量→溶化→ → →加棉塞→包扎．若检验自来水中的大肠杆菌是否超标，需在培养基中加入 ；若将农田土壤表层中的圃褐固氮菌与其他细菌分离出来，则需要在 的培养基上培养．按照培养基的用途划分，前者属于 培养基，后者属于 培养基．在细菌的培养过程中，将培养基分装到试管中的高度约为试管高度的X；加棉塞时，棉塞在试管口内的长度是棉塞长度的Y；将培养基搁置斜面时斜面长度最多是试管长度的Z．则X、Y、Z对应的比值依次是 ．下表是木屑培养基各成分所占比例：成分木屑米糠石膏粉蔗糖比例78%20%1%1%此培养基加水后可用于平菇的培养，用简易的方法对培养基进行灭菌时，要重复 2?3次，其主要目的是有利于彻底杀灭萌发的 ．