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名词解释题
Bacteria, eubacteria (真细菌)
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In most people who breathe in TB bacteria and become infected, the body is able to fight the bacteria to stop them from growing. ()
此题为判断题(对，错)。
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When a person breathes in TB bacteria, the bacteria can settle in the stomach and begin to grow. ()
此题为判断题(对，错)。
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第三组：The sewage treatment system must be capable of discharging an effluent that comes within the limits of the tests. Sewage can be treated biologically so that it may be discharged with minimal damage to ecosystem. Biological treatment involves the use of living organisms to treat the sewage within the sewage treatment plant so the liquids and sludge discharged are within the standards specified.Biological treatment plants are usually built up as a module and consist of various sections.Waste matter collected from the ships sanitary appliances is led through a sanitary piping system to the treatment module. The solid matter is broken up by passing it through a screen or a series of revolving cutters. The broken up solid material, together with the waste liquid, passes into a tank containing bacteria which require oxygen and a nutrient to propagate. The nutrient is contained in the solid waste material, and oxygen is supplied by bubbling compressed air through the broken up waste. The propagated bacteria change the waste material into a sludge by aerobic digestion. The sludge is finally treated to kill the coliform. bacteria before it is passed overboard.When a biological sewage plant is started up, such as when activating a new ship or after cleaning out the tank, a pellet containing bacteria is introduced into the tank. It takes approximately one week for the bacteria to propagate and make the system fully effective. The choice of sanitary appliance cleaners requires extreme care, as many cleaners are toxic to the active bacteria. Once a biological sewage plant is made active it should not be shut down. If it is it will have to be reactivated again because the bacteria will die without a supply of nutrients and oxygen.Bacteria that require oxygen for their survival are referred to as aerobic. Aerobic bacteria are normally used in ships sewage treatment equipment. Other forms of bacteria that do not require oxygen are referred to as anaerobic. Anaerobic bacteria are used in shore based sewage treatment works where methane is obtained as a by-product for use as fuel.This passage is mainly aboutA.sewage treatment methodsB.the various sections of a sewage treatment plantsC.biological sewage treatment systemD.how the sewage treatment plants are started up
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以下微生物属于环境工程微生物范畴的是（）。A、病毒、蓝细菌、真细菌、粘细菌。B、原生动物、蓝细菌、真核藻类、放线菌、粘细菌。C、微型后生动物、酵母菌、霉菌、真细菌。D、病毒、螺旋体、细菌、放线菌、真菌、原生动物、微型后生动物。
考题
单选题In order to culture and propagate enough bacteria to treat the body and galley wastes（）A
a new bacteria colony should be put into the plant in advanceB
the disinfection chemicals should be always usedC
the air blower should be started and keep running in advanceD
the nutrient for bacteria should put into plant in advance
考题
单选题以下微生物属于环境工程微生物范畴的是（）。A
病毒、蓝细菌、真细菌、粘细菌。B
原生动物、蓝细菌、真核藻类、放线菌、粘细菌。C
微型后生动物、酵母菌、霉菌、真细菌。D
病毒、螺旋体、细菌、放线菌、真菌、原生动物、微型后生动物。
考题
单选题Cooking is an effective way in preserving food because ______.A
cooking always kills the bacteria in foodB
cooking can make the food become dryC
the fire in cooking can kill bacteriaD
under the right conditions, cooking will kill bacteria
考题
单选题Many people are against the use of chemicals to preserve food because ______.A
chemicals are not necessary for preserving foodB
a small quantity of bacteria in food is good to peopleC
those chemicals that kill bacteria may not be good to peopleD
there are other better ways to preserve food
考题
名词解释题纤维分解菌 cellulose-decomposing bacteria
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