单选题When the mixture is used, it is important to ______.A keep sugar and salt in waterB drink it as often as necessaryC take it as much as possibleD use it to kill the bacteria
题目
keep sugar and salt in water
drink it as often as necessary
take it as much as possible
use it to kill the bacteria
相似考题
更多“单选题When the mixture is used, it is important to ______.A keep sugar and salt in waterB drink it as often as necessaryC take it as much as possibleD use it to kill the bacteria”相关问题
-
第1题：
When anaerobic bacteria convert the sewage to an inert sludge, .
A.no oxygen is needed
B.oxygen is necessary
C.oxygen is given off
D.no gas is produced
正确答案：A
-
第2题：
When started, a complete oily water separating unit is first filled ______. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.
A.with dirty water
B.with clean water
C.by oily water
D.by mixed water
正确答案：B
-
第3题：
共用题干
Ward off Travel Bugs
1 As the holiday season approaches,so does the prospect of jet lag,an upset stomach or sunburn. With care and some help from natural sources,however,it is quite possible to avoid these problems.
2 You can start to prepare a couple of weeks before you leave.Food poisoning will make any holiday miserable,but by taking some medicine such as lactobacillus and bifidobacteria,you can reduce the likelihood of succumbing to poisoning brought on by food or water tainted with unfamiliar bacteria.
3 By improving the bacteria balance in your digestive tract,you crowd out the pathogenic bacteria and stop them gaining a foothold.The beneficial bacteria also produce gentle but effective natural antibiotics in your gut.
4 In many holiday locations you need to remember the basics:drink bottled water,avoid undercooked meat and ensure that food hygiene is adequate.If you do succumb to food poisoning,drink plenty of water to stay hydrated and see a doctor.However,if you detect diarrhea early enough,you might like to try taking about 10 or 15 pancreatic digestive enzymes,which can digest the multiplying bacteria before they take over.
5 Taking a teaspoon of silicol gel can also help.This lines the stomach and upper intestinal area arid binds with bacteria and viruses,allowing them to be safely passed out of the gut.When you pack,include grapefruit- seed extract,which is an excellent all-round anti一bacterial,anti-parasitic,anti.viral and anti-fungal agent.
6 Your flight can also be made more pleasant.Peppermint oil and ginger capsules ward off motion sickness,but a more delicious option is to nibble on crystallized ginger.if you tend to get earache on take-off and landing,you can use special earplugs with filler that slows down the rate of change in air pressure.
7 The greatest concern is"economy class syndrome",the popular name for deep-vein thrombosis, which can lead to blood clots traveling from the legs to the lungs,heart or brain.To reduce this,you need a couple of hours to stay hydrated,and avoid alcohol.
8 You can also reduce the severity of inflammation by taking a daily gram of vitamin C with the bioflavonoidquercetin.Vitamin C and quercetin also help to reduce prickly heat.
9 Finally,if any adverse symptoms persist while overseas,you should see a doctor.It is important to drink a lot of water______.
A:when your plane is about to land
B:when you are taking tablets
C:when you suffer from food-poisoning
D:when you are travelling
E:when you are packing for your tour
F:when you are having a cold答案：C解析：文章第一段主要讲随着度假季节的临近，要注意防止时间差、肠胃不适或太阳灼伤等度假时常遇到的问题，故选C。
文章第四段的第一句便引出了本段的主要内容，即关于饮食方面的基本卫生，故选A。
第五段主要介绍的内容为在旅行时带上一些诸如偏磷酸酪蛋白氧化硅胶以及葡萄籽榨汁等药物来防止细菌和病毒，故选B。
文章第六段主要介绍了缓解乘坐飞机引起的不适时所应进行的准备，故选D。
文章的第二段至第五段的内容都在介绍有关旅行中饮食安全方面的问题，故选D。
文章第六段最后一句中提到，如果在飞机起飞和降落时出现耳痛症状，可以用装有填充物的特殊耳塞来减缓气压的变动率，故选A。
由文章第四段第二句可知，如果发生食物中毒的情况，要大量饮水，保持体内水分，并去看医生，故选C。
文章第五段最后一句中提到，当你旅行打包时，要带上葡萄籽榨汁来防治细菌和寄生虫等病菌，故选E。 -
第4题：
It seems so natural to put up an umbrella to keep the water off when it rains.But actually the?umbrella was not invented as protection against rain.Its first use was as a shade against the sun!
Nobody knows who first invented it,but the umbrella was used in very ancient times.Probably?the first to use it were the Chinese,as early as the eleventh century B.C.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade.And there?was a strange thing connected with its use:it became a symbol of honour and authority.In the Far?East in ancient times the umbrella was allowed to be used only by royalty or by those in high office.
In Europe,the Greeks were the first to use the umbrella as a sunshade.And the umbrella was?in common use in ancient Greece.But it is believed that the first persons in Europe to use the?umbrella as protection against the rain were the ancient Romans.
During the Middle Ages,the use of the umbrella practically disappeared.Then it appeared?again in Italy in the late sixteenth century.And again it was considered a symbol of power and authority.By 1680,the umbrella appeared in France,and later on in England.
By the eighteenth century,the umbrella was used against rain throughout most of Europe.Umbrellas have not changed much in style during all this time,though they have become much lighter in weight.It wasn′t until the twentieth century that women′s umbrellas began to be made,in a whole variety of colours.
A strange feature of the umbrella′s use is that it was used as__________.A.protection against rain
B.a shade against the sun
C.a symbol of honour and power
D.a way of women's decoration答案：C解析：【考情点拨】事实细节题。【应试指导】文章第三段指出，雨伞曾经是荣耀、权威和权势的象征，这在今天看来是很奇隆的。 -
第5题：
There is no reason they should limit how much vitamin you take,____they can limit how much water you drink.A.no less than
B.not any more than
C.no more than
D.much more or less答案：B解析：题目意为“他们没有理由限制你摄入多少维生素，正如他们没有理由限制你喝多少水。”no...more than或no/not any more than意为“与……同样不”。选项A意为“不少于，多达”，选项B意为“与……同样不”，选项C意为“只是，只不过”，选项D意为“差不多”。
-
第6题：
There wouldn’t be enough water for us if we didn’t_________.A.turn to the oceans for more water
B.reuse used water and make use of seawater
C.desalt seawater
D.take steps to reuse all water on earth答案：B解析： -
第7题：
We（）every day when we were children.
- A、used to swim
- B、used to swimming
- C、use to swim
- D、use to swimming
正确答案:A -
第8题：
单选题When collecting condensation for drinking water，（）.Aa sponge used to mop up and store condensation must be kept salt free
Bonly condensation on the bottom of the canopy should be collected
Cit should be strained through a finely woven cloth
Dchlorine tablets should be used to make it drinkable
正确答案： A解析： 暂无解析 -
第9题：
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.6 Some African people once drank animal urine______.Awhen they were going to die
Bbecause they were thirsty
Cbecause there was little salt
Dbecause they were short of water
正确答案： B解析： -
第10题：
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.7 In order to adjust to the loss of salt, the body______.Aloses some blood
Bspeeds up its secretion of water
Cspeeds up its secretion of salt
Dis drying up slowly
正确答案： D解析： -
第11题：
单选题The first reason that the British do not buy snow-ploughs is that ______.Aspreading salt is good enough
Bold people need more money
Csnow-ploughs are not used often
Dthe hospital is more important
正确答案： B解析： -
第12题：
单选题Many people are against the use of chemicals to preserve food because ______.Achemicals are not necessary for preserving food
Ba small quantity of bacteria in food is good to people
Cthose chemicals that kill bacteria may not be good to people
Dthere are other better ways to preserve food
正确答案： A解析：
根据文章最后两句Some people oppose the use of chemicals in food. They say that these chemicals may harm people if the chemicals can harm bacteria.可知，人们反对使用化学物质来保存食物的原因是这些化学物质可能对人有害，C)是对这句话的同义转述。 -
第13题：
A
If you go to a fast food restaurant．you will probably see a lot of teenagers． Today，many teenagers are overweight，and some of．this is because of their bad eating habits．， Most teenagers love food with a lot of fat，oil，salt，and sugar． People often call this kind of food "junk food"．
But． bad eating habits go beyond fast food． We find many teenagers eat unhealthily． Some don't have breakfast before they go to school． During the day，some don't have a proper meal for lunch． In a recent survey at one school，scientists found that over two-thirds of the students didn't follow a healthy diet． They didn't like vegetables，and many of them didn't like to eat fruits． They preferred to eat food with a lot of salt，sugar，or fat．
Parents today also worry about their children's diet． Some doctors give the ．following ad-vice :
★Teenagers shouldn't eat too much junk food．
★ Teenagers shouldn’t eat food with too much salt． Salt can cause high blood pressure(高血压) in the future．
★Teenagers should eat food with less fat，oil，and sugar．
★Teenagers need to eat some fruits and vegetables every day: Fruits and vegetables arerich in vitamins(维生素 ) and have little fat．
★Teenagers need to drink more milk． Milk will help their bones grow．
★Teenagers need to eat breakfast every day． This is good for their body and mind．
( )21．"Junk food" contains(包含) a lot of ________．
A． milk and sugar
B． fruits and sugar
C． vegetables and salt
D． fat，oil，salt and sugar
正确答案：D
．21．D【解析】由第一段最后两句Most teenagers love food with a.lot of fat，oil，salt，and sugar. People of- ten call this kind of food“junk food".可知。 -
第14题：
In determining the scope of cable to be used when anchoring, what would NOT be considered__________.
A.Depth of the water
B.Character of the holding ground
C.maintenance cost for the chain
D.Type of anchor cable
正确答案：C
抛锚中，在确定使用锚链长度时什么不将被考虑？维护锚链的成本 -
第15题：
It was obvious that she was not going home.A:evident
B:necessary
C:possible
D:probable答案：A解析：本题考查的是对形容词的认知能力。本句意思：很明显，她不会回家。obvious明显的、显而易见的。选项A evident明显的，例如：He looks at twelve children with evidentpride．他得意洋洋地看着12个儿女。选项B necessary必要的。选项C possible可能的。选项D probable很可能的。obvious和evident意思最接近，所以选A。 -
第16题：
It seems so natural to put up an umbrella to keep the water off when it rains.But actually the?umbrella was not invented as protection against rain.Its first use was as a shade against the sun!
Nobody knows who first invented it,but the umbrella was used in very ancient times.Probably?the first to use it were the Chinese,as early as the eleventh century B.C.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade.And there?was a strange thing connected with its use:it became a symbol of honour and authority.In the Far?East in ancient times the umbrella was allowed to be used only by royalty or by those in high office.
In Europe,the Greeks were the first to use the umbrella as a sunshade.And the umbrella was?in common use in ancient Greece.But it is believed that the first persons in Europe to use the?umbrella as protection against the rain were the ancient Romans.
During the Middle Ages,the use of the umbrella practically disappeared.Then it appeared?again in Italy in the late sixteenth century.And again it was considered a symbol of power and authority.By 1680,the umbrella appeared in France,and later on in England.
By the eighteenth century,the umbrella was used against rain throughout most of Europe.Umbrellas have not changed much in style during all this time,though they have become much lighter in weight.It wasn′t until the twentieth century that women′s umbrellas began to be made,in a whole variety of colours.
Which of the following statements is NOT true about the umbrella?A.No one exactly knows who was the inventor of the umbrella.
B.The umbrella was first invented to be used as protection against the sun.
C.The umbrella changed much in style in the eighteenth century.
D.In Europe the Greeks were the first to use the umbrella as a sunshade.答案：C解析：【考情点拨】事实细节题。【应试指导】文章最后一段指出，18世纪的雨伞除了重量有所减轻之外，形状的变化并不大。 -
第17题：
The water we drink and use is running short in the world.We all have to learn how to stop wasting our limited water.One of the steps we should take is to find ways of reusing it.Experiments have already been done in this field.
Today in most large cities,fresh water is used only once,then it runs into waste system.But it is possible to pipe the used water to a purifying factory.There it can be filtered and treated with chemicals so that it can be used again,just as it were fresh from a spring.
But even if every large city purified and reused its water,we still would not have enough.Then we could turn to the oceans.All we’d have to do to make use of the seawater on earth is to get rid of the salt.This process is called desalinization,and it is already in use in many parts of the world.
The way to stop wasting our limited water is to________.A.do experiments with water
B.purify the used water and reuse it
C.use fresh water once again
D.make use of seawater答案：B解析： -
第18题：
There is no reason they should limit how much vitamin you take，( )they can limit how much water you drink.A.much more than
B.no more than
C.no less than
D.any more than答案：D解析：考查比较结构。A项意为“比...多得多”；B项意为“和……一样不，仅仅”；C项意为“多达”；D项no...more than意为“两者都不”，其强调形式为not...any more than。由于前一句已有否定词no，因此D项正确。故本题选D。句意：正如他们无权限制人们喝多少水一样，他们也没有理由限制人们摄入多少维生素。 -
第19题：
Cement wash is a mixture of cement powder and （）.
- A、fresh water
- B、steel
- C、paint
- D、wood
正确答案:A -
第20题：
单选题When Americans take a break, they often head（）their favorite vacation place.Ainto
Bonto
Cover
Dfor
正确答案： C解析： 暂无解析 -
第21题：
单选题Cooking is an effective way in preserving food because _____.Acooking always kills the bacteria in food
Bcooking can make the food become dry
Cthe fire in cooking can kill bacteria
Dunder the right conditions, cooking will kill bacteria
正确答案： A解析：
根据第二段首句Cooking will usually kill bacteria if the temperature is high enough and long enough.可知，在一定的条件下(即温度够高、时间够长的话)，烹饪法能杀死细菌，因此是一种保存食物的有效方法。 -
第22题：
单选题Passage2 Questions 6 to 10 are based on the following passage. Salt is as necessary to life as water. In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in. urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys（肾） and sweat glands(腺). It then tries to adjust to this loss by speeding up its secretion(分泌) of water. (78) In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing.Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of. salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.10 What is the main idea of the passage?ASalt is very important.
BIf their blood salt level is not constant, human beings may die.
CThe amount of salt in the body is secreted.
DPeople can die of thirst.
正确答案： A解析： -
第23题：
单选题When you bake sugar cookies, it is important that one remembers to chill the dough before cutting the shapes.Ait is important that one remembers to chill the dough
Bremembering to chill the dough is important
Cit is important that you remember to chill the dough
Dchilling the dough is important for you to have remembered
Eto chill the dough is important for one to remember
正确答案： C解析：
这个句子在代词的使用上不一致。句子前半部分使用的代词是you，而后半部分使用的是one。