Too much air in the furnace of an oil-fired boiler would be indicated by （）.
A . yellowish flame
B . golden yellow flame
C . white flame
D . brilliant white flame
相似题目
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If the teacher were talking too much in class the students would not be learning.（）
A . 正确
B . 错误
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The forced draught fan should be started and air passed through the furnace for several minutes to “（）” it of any exhaust gas or oil vapors.
A . blow
B . clean
C . scavenge
D . purge
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How much is the percent of air transportation in all modes?（）
A . Less than 1%
B . Lowest
C . Lower
D . Low
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As for a oil-fired boiler too much air would indicated by （）.
A . yellowish flame
B . golden yellow flame
C . milky flame
D . brilliant white flame
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There is too much water in the fuelIt doesn’t （） to the specifications.
A . come from
B . come in
C . come out
D . come u
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The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.
A . has begun
B . takes place
C . occurs
D . happe
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Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant? （） (1) too little cooling water (2) too much cooling water (3) too warm cooler water
A . （1）only
B . anyof（1），（2）and（3）
C . anyof（1）and（3）
D . anyof（1）and（2）
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The defective places in the furnace （） with fire bricks.
A . should be paved
B . should be cleaned
C . should be dismantled
D . should be welded
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I tried（）the book in a few days, but actually I couldn't, just because of too much work for me.
A . finish
B . finishing
C . to have finished
D . finished
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（） rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.
A . Piston
B . Sounding
C . Regulating
D . Connecting
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Too much excess air is （）because the heat generated is being lost through the exhaust trunking instead of being made used of in heating the water to produce steam.
A . not good
B . good
C . better
D . the best
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The country has（）too many wars in the past few decades; its people are longing for peace so much.
A、prevented from
B、resulted in
C、gone through
D、gone with
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The hair of the dog refers to an alcoholic drink taken in the morning to cure the pain in your head that was caused by drinking too much alcohol the night before.
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______refers to an alcoholic drink taken in the morning to cure the pain in your head that was caused by drinking too much alcohol the night before.
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Don't speak with too much facial expression and too many gestures in the job interview.
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The author of Passage 1 asks the students to remember to regulate and balance their time because too much time online can mean little time in real-life studying or exercising or visiting with friends.
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Too much _______ to dirty air can cause people to suffer from allergies and diseases that will eventually affect people's health.
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听力原文：W: Renting the conference room at the hotel will cost us too much. We’re already running in the red.
M: How about using our dining room for the meeting？
Q: What's worrying the woman？
(14)
A．The organization of a conference.
B．The cost of renting a conference room.
C．The decoration of the conference room.
D．The job of cleaning up the dining room.
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I can't go to the New Year' s concert, ______ dollars is just too much for me to spend in one evening.
A．in other words
B．that is
C．in particular
D．I mean
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The boy had a violent pain in his stomach after eating too much ice-cream.
A．outrageous
B．fatal
C．fierce
D．frequent
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There ______ in this room.re too much furnitureB．is too mny furnitures C．re too much furniture. There ______ in this room.re too much furniture B．is too mny furnitures C．re too much furnitures D．is too much furniture
A．are too much furniture
B．is too many furnitures
C．are too much furnitures
D．is too much furniture
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Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant？ (1) too little cooling water; (2) too much cooling water; (3) too warm cooler water.
A.(1) only
B.any of (1), (2) and (3)
C.any of (1) and (3)
D.any of (1) and (2)
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Too much metal in the soil is considered pollution. Yet too little metal in a person's diet can cause health problems. An American scientist says the answer to both problems may be plants that take up large amounts of metal in their tissues.
David Salt is an expert on plants at Purdue University in West Lafayette, Indiana. He is working with plants that store large amounts of metals.
In recent years, scientists have shown interest in using such plants to clean up harmful waste materials. Professor Salt says such plants also could be used to improve people's diets or even to create foods that fight cancer.
Humans need a number of metals in their diets, including iron and zinc. These metals are needed in very small amounts, however. That is why they are called micronutrients. The lack of micronutrients is blamed for health problems in many developing countries. Children and pregnant women are mostly affected.
Recently, Mr. Salt announced that he has identified and copied the genes from a kind of plant that stores metals in its tissues. He says his study suggests it may be possible to develop plants that contain minerals needed for good health.
For example, the metal selenium is a strong anti-cancer agent. Some wild plants store selenium naturally. Mr. Salt says foods to fight cancer might be created if genes from these plants could be moved into crop plants.
Locoweed, which is a common plant in the western U.S., stores selenium. Professor Salt says it may be possible to create cancer-fighting foods from it. He and scientists from a company called Unicycle Therapies have copied the gene that causes locoweed to take up selenium from the soil.
Many people take pills to add important minerals or vitamins to their diet. However, Mister Salt notes that most selenium products sold in health food stores are of little use. That is because the human body can only take in and use selenium if it is in the right chemical form.
The scientist says his team would like to develop a vegetable crop high in selenium. He wants to create an anti-cancer product in the foods we already eat.
According to Pro. Salt, plants that take up large amounts of metal in their tissues can be used to ______.
A．clean polluted soil and cure disease like cancer
B．clean up harmful waste materials in soil and improve people's diet
C．produce large number of micronutrients such as iron and zinc
D．create food with important minerals or vitamins
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In a world whereit seems we already have too much to do, and too many things to think about, itseems the last thing we need is something new that we have to learn.But use cases dos
A．impossible
B． possible
C． sensible
D． practical
