网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
Most marine biological sewage treatment plants consist of all the following statements except ______.
A.aeration(通风) tanks
B.settling tanks
C.disinfection agent(消毒剂)
D.anaerobic bacteria(厌氧菌)
参考答案
更多 “ Most marine biological sewage treatment plants consist of all the following statements except ______.A.aeration(通风) tanksB.settling tanksC.disinfection agent(消毒剂)D.anaerobic bacteria(厌氧菌) ” 相关考题
考题
Most marine biological sewage treatment plants consist of all the following statements except()
A.aeration tanksB.settling tanksC.disinfection agent(消毒剂D.anaerobic bacteria(厌氧菌)
考题
The biological sewage treatment plant utilizes Oto completely break down the sewage into an acceptable substance for discharge－into anywaters
A.agitation functionB.bacteriaC.chemicaD.oxidizing function
考题
Most people are familiar with the idea that all matter() atoms.
A、consists ofB、consist ofC、is consisted ofare consisted of
考题
All of the following statements about nonverbal communication are true EXCEPT_______.
A.The gesture of nodding means "Yes" in all cultures.B.Nonverbal signs can be used as a means of substituting for verbal communicationC.The handshake is the most common touching behavior. of greeting business peopleD.In western countries, personal space is highly valued
考题
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
考题
Biological treatment may use __ to treat sewage (1)living organisms (2)chemicals (3)additivesA.(1)B.(2)C.(3)D.(1)(2)(3)
考题
Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except ______A.bacteriaB.mouldsC.yeastsD.seals
考题
共用题干
Ecosystem1. The word “ecosystem” is short for ecological（生态的）system. An ecosystem is where living creatures expand within a given area. You can say that an ecosystem is the natural environment where biological organisms（生物）such as plants,animals and humans co-exist in this world. So naturally that includes you and me. Yes,we are all members of an ecosystem!2 .There are different kinds of ecosystems depending on the type of surface or environ-ment. Most are naturally made such as the ocean or lake and the desert or rainforest.Some are man-made or artificial to encourage co-habitation（同居）between living and non-living things in a monitored environment,such as a zoo or garden.3 .Plants make up the biggest group of biological creatures within an ecosystem,and that's because they are the natural food producers for everyone. Plants raised in the earth need air and collect sunlight to help them grow. When they grow,the plants and its fruits or flowers eventually become a source of food to animals,microorganisms（微生物）and even hu- mans,of course. Food is then converted to energy for the rest of us to function,and this hap-pens in a never-ending cycle until the living creatures die and break up back in the earth.4 .Ecosystems are the basis of survival for all living things.We depend on plants and ani-mals for food. In order for us to exist,we need to grow and care about other organisms. We also need to care for the non-living things within our environment like our air and water so we can continue living as a population. Since plants,animals and humans are all of various species（物种）,we all play a role in maintaining the ecosystem.5 .To preserve our ecosystems,we should stop using too much energy,which happens when we consume more than our share of resources. Humans should not disturb the natural habitat（栖息地）of plants and animals,and allow them to grow healthily for the cycle to con-tinue. Too many people in a habitat can mean displacement（搬迁）: imagine being thrown out of your home because there is no more space for everyone. Worse,overpopulation can also ru- in the environment and cause destruction of existing plants and animals.Plants,animals and humans are all effective in______.A: our share of resourcesB: a biological creatureC: a given areaD: the maintenance of the ecosystemE: the source of foodF: various species
考题
Which of the following is the MOST important reason for referencing the HCL？（）A、 To ensure that all hardware being used has previously been testedB、 To ensure that all hardware being used has the latest firmwareC、 To ensure that all hardware being used is the most energy efficientD、 To ensure that all hardware being used can be upgraded in the future
考题
单选题According to the passage, most American Indian children loved all the following EXCEPT _____.A
fishingB
huntingC
swimmingD
singing
考题
多选题If p and q are primes greater than 2, which of the following statements must be true? (Indicate all such statements.)Ap + q is evenBpq is oddCp2-q2 is even
考题
多选题Concerning the figure below, if a =b, which of the following statements must be true? (Indicate all such statements.)Ac=dBl and k are parallelCm and l are perpendicular
考题
单选题Which of the following about The Times is not true?A
The circulation is very small.B
This is the most famous of all British papers.C
The most important British people all over the world still read it.D
It is most critical of established interests.
考题
多选题Which of the following statements are true? (Indicate all such statements.)Aτ(5) =τ(7)Bτ(5) τ(7) =τ(35)Cτ(5) + τ(7) =τ(12)
考题
单选题Which of the following is NOT among the solutions to the lack of sewage water treatment plants?A
Cooperation with other organizations.B
Cooperation with the World Bank.C
Two projects about treatment plants for sewage waters in Vlore and Pogradec.D
To control the waste water discharged.
考题
单选题The basic process of biological sewage treatment consists of the liquor either by bubbling air through it or by agitating the surface（）A
oxygenatingB
oxidizingC
deoxygenatingD
proportioning
考题
单选题Slugs are described as willing to eat all of the following EXCEPT ______.A
decaying plantsB
topsoilC
moldD
other slugsE
living plants
考题
单选题（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.A
anaerobic bacteriaB
aerobic bacteriaC
air bubblesD
disinfection chemicals
考题
单选题Concerning the management of sewage treatment plant using activated sludge, which of the following is correct?（）A
the plant should be prohibited to supplying airB
the plant should work at intervalsC
the plant should be added disinfector in timeD
we should check strength of activated sludge, ivory-white color is best
考题
单选题A number of biological sewage treatment plants are in use at sea but nearly all work on what is called the extended aeration processBasically the consists of oxygenating the liquor by bubbling air through itAccording to the above two sentences, the word "this" means （）.A
a sewage treatment plantB
the extended aeration processC
the liquorD
the bubbling air
考题
单选题Disinfector in the sewage biological treatment plant usually is （）A
chlorine waterB
ozoneC
hypo-calcium chlorideD
calcium oxide
考题
单选题Most marine biological sewage treatment plants consist of all the following statements except （）.A
aeration tanksB
settling tanksC
disinfection agentD
anaerobic bacteria
考题
单选题In sewage treatment, the term maceration refers to the process of （）A
breaking up solid matter into fine particlesB
precipitating non-decomposed waste in a collection tankC
chemically adjusting the sewage ph to 7-0D
eliminating bacterium coli from the sewage
考题
单选题A number of biological sewage treatments plants are in use at sea but nearly all work on the principle called （）A
deoxygenatingB
extended aerationC
oxygenatingD
bubbling air
考题
单选题Before marine sewage treatment plant works （） should be filled with fresh water.A
deposition chamberB
oxidation poolC
disinfection chamberD
all chamber
考题
单选题Based on the text, which of the following statements is true?A
Advertisements form part of a nation’s culture.B
Advertising is legalized lying.C
Promise, large promise, is the soul of all advertisement.D
Advertising has put an end to the power of the most powerful adjective.
考题
单选题Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.A
bacteriaB
mouldsC
yeastsD
seals
热门标签
最新试卷