题目内容
（请给出正确答案）
Fishes help curb malaria and other mosquito-borne diseases by eating mosquito larvae.
A．Y
B．N
C．NG
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“Fishes help curb malaria and other mosquito-borne diseases by eating mosquito larvae.A．YB．”相关的问题
Fishes
The term fish is applied to a variety of cold-blooded aquatic vertebrates of several evolutionary lines. Fish share certain features with other vertebrates. These features are gill slits (鳃裂) at some point in the life cycle, a notochord (脊索), or skeletal supporting rod, a dorsal hollow nerve cord, and a tail.
The study of fishes, the science of ichthyology (鱼类学), is of broad importance. There are many reasons why fishes are of interest to humans; the most important is their relationship with and dependence on the environment. A more obvious reason for interest in fishes is their role as a moderate but important part of the world's food supply. This resource, once thought unlimited, is now realized to be finite and in delicate balance with the biological, chemical, and physical factors of the aquatic environment. Overfishing, pollution, and alteration of the environment are the chief enemies of proper fisheries management, both in fresh waters and in the ocean.
Another practical reason for studying fishes is their use in disease control. As predators on mosquito larvae, they help curb malaria and other mosquito borne diseases. Fishes are valuable laboratory animals in many aspects of medical and biological research. For example, the readiness of many fishes to acclimate to captivity has allowed biologists to study behaviour, physiology, and even ecology under relatively natural conditions. Fishes have been especially important in the study of animal behaviour where research on fishes has provided a broad base for the understanding of the more flexible behaviour of the higher vertebrates.
There are aesthetic and recreational reasons for an interest in fishes. Millions of people keep live fishes in home aquariums for the simple pleasure of observing the beauty and behaviour of animals otherwise unfamiliar to them. To many, aquarium fishes provide a personal challenge, allowing them to test their ability to keep a small section of the natural environment in their homes. Sportfishing is another way of enjoying the natural environment, also indulged in by millions of people every year. Interest in aquarium fishes and sportfishing support multimillion dollar industries throughout the world.
Fishes have been in existence for more than 450,000,000 years, during which time they have evolved repeatedly to fit into almost every conceivable type of aquatic habitat. In a sense, land vertebrates are simply highly modified fishes, for when fishes colonized the land habitat they became tetrapod (四足的) land vertebrates. The popular conception of a fish as a slippery, streamlined aquatic animal that possesses fins and breathes by gills applies to many fishes, but far more fishes deviate from that conception than conform. to it. For example, the body is elongate in many forms and greatly shortened in others; the body is flattened in some (principally in bottom-dwelling fishes) and laterally compressed in many others; the fins may be elaborately extended, forming intricate shapes, or they may be reduced or even lost; and the positions of the mouth, eyes, nostrils, and gill openings vary widely. Air breathers have appeared in several evolutionary lines.
Many fishes are cryptically coloured and shaped, closely matching their respective environments; others are among the most brilliantly coloured of all organisms, with a wide range of hues, often of striking intensity, on a single individual. The brilliance of pigments may be enhanced by the surface structure of the fish, so that it almost seems to glow. A number of unrelated fishes have actual light-producing organs. Many fishes are able to alter their coloration, some for the purpose of camouflage, others for the enhancement of behavioral signals.
Fishes range in adult length from less than 10 millimetres to more than 20 metres and in weight from about 1.5 grams to many thousands of kilogr
A．Y
B．N
C．NG
A.help
B.curb
C.make
D.increase
The fishes are about 1.5 meters long and look like carps(鲤鱼). There will be a detector intheir bodies. They canfind the sources of pollutionin the water, and then the robot fisheswilleat part of it. Unlike other robots, they don’t need to be controlled by people faraway. Therobots all have an eight-hour battery. They can “swim” in the sea freely and send backinformation to people on the beach. After their batteries die, they will return by themselves.
There are five robot fishes altogether now.Each costs about 29,000 dollars. They are partof a three-year project between engineering company BMT Group and Essex University insoutheastern England.
“We designed the fishes creatively. We hopethe robot fishes can find the changes in the seawater and report back the information,” said Professor Huof Essex University. His team isdeveloping the fishes.
What will the robots do if they find the pollution in the water？
A.They will eat part of it.
B.They will stop working.
C.They will tell people where they are.
D.They will take it out to the beach.
How longcan a battery in their bodies work each time？A.For five hours
B.For eight hours.
C.For twelve hours.
D.For one day.
How much do the five robot fishes cost altogether？ A.$14, 500.
B.$29,000.
C.$145,000.
D.$1,450, 000.
Which of the following is TRUE？ The robot fishes ____.A.can eat anything in the water
B.need to be controlled by people
C.are 1.5 meters long andthey look like sharks
D.cango back to the beach when the batteries run down
What can we learn from the passage？ The robot fishes____.A.have worked around the world
B.can’t take out the trash in the water
C.will helppeopledetect the pollution in the water
D.help to find other fishes in the rivers, lakes and seas
请帮忙给出每个问题的正确答案和分析，谢谢！
阅读理解：正误判断
The Wichita Falls Police Department is trying to help curb crime in neighboring communities throughout the city. On Saturday Wichita Falls Police gave a free two-hour presentation to help locals keep their community crime free.
More than 20 people showed up at the Martin Luther King Center in east Wichita Falls to be part of the presentation.
Wichita Falls Police Officer Jeff Hughes said that they wanted to make sure the folks out there were aware they were doing everything to take away the opportunity from a bad guy.
Hughes reminded those in attendance that their homes outside presentation could be an open invitation to criminals. One of the biggest ways to prevent crime, according to Hughes is to use CPTED. Also known as Crime Prevention Through Environmental Design.
“The biggest site, that we are dealing with now, that we are endorsing fully, is Nextdoor and it's simply just nextdoor.com,”
The site is free and helps locals set up a Virtual Community that they can interact with from the comfort of their own home.
"With www.nextdoor.com it all happens in a web based program where if you send something out it gets to that group or that person instantly, they will get an alert on their phone or an email," said Hughes.
According to Hughes, he has already seen a positive impact locally from the site and hopes it can continue to expand in Wichita Falls.
操作提示：句子正确选择下拉选项框为“T”;句子错误选择下拉选项框为“F”。
1. The Wichita Falls Police Department is planning sterner measures to combat crime. {T、F}
2. According to Hughes, one of the biggest ways of crime prevention is through environmental design. {T、F}
3. The biggest site that police are approving fully is nextdoor.com. {T、F}
4. The purpose of nextdoor.com is to help locals set up a real community. {T、F}
5. If you use the nextdoor.com site, you have to pay for it. {T、F}
Contribute to Us
Today — You Can Make a Difference
Our mission is to empower every person to assist their communities in protecting the health of their environment and the world. Whether you recycle at your curb every morning, collect cans, reuse materials, attend events — everyone can contribute to our world. No effort is too small.
Donations to PLANET 911 are used to educate the general public about the public services provided by PLANET 911. They are used for outreach to more environmental services to encompass more people, to update and maintain recycling listings, and to empower individuals with what they need to know to make a difference.
Your contribution will help bring us closer to our goal of bringing communities and world together into an environmentally conscious and healthy future.
What is the goal of the organization？
A．To raise public awareness of the environment.
B．To improve public services.
C．To encourage donations.
D．To recruit environmental activists.
M: Good morning, Cindy.
W: Roberta, what exactly do time management consultants do？
M: Well, Cindy, it's all about helping people to organize their work in an ef fective way: maximum efficiency; minimum stress.
W: Hah, sounds like something I need. Who are your clients？
M: Um, mainly business people, but I've also worked with politicians, civil servants and university lecturers.
W: Um, quite a range, then. And what sort of things help people to organ ize their time？ I suppose punctuality is important.
M: Um, yes and no. It's easier to finish a meeting on time if it starts on time. But in international contexts, you do have to be aware of cultural differences.
W: For example？
M: Well, in Britain big, formal meetings usually start on time, but less for mal meetings often begin a few minutes late. In Germany, on the other hand, people expect all meetings to begin on time; In some countries, er, for example, in Latin America, there's a more relaxed attitude. So, you d6 have to adapt to circumstances.
W: Um, it sounds like even if you manage your own time very well, you still can't control what other people do.
M. Well, you can set limits. If you're meeting a friend who always arrives late, you can say, "Well, I'm going to wait for 15 minutes. If they aren't there by then, I'll leave,"
W: Hmm. I've got one friend who's always late. I don't think I'd ever see her if I did that.
M: Hah, but people who are always late are the ones you need to set limits with. If they know that you won't wait, then, perhaps they'll make an effort.
W: Isn't that rather harsh？
M: No, not really. Someone who constantly turns up late is putting a low value on your time. Let them know you've got other things to do. And I'm not suggesting you do that with everyone just the persistent latecomers.
(20)
A．To help people to organize their work in an effective way.
B．To help people to become efficient at their jobs.
C．To help people to arrange their time properly.
D．To help people to reduce stress.
SECTION C NEWS BROADCAST
Directions: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, you will be given 10 seconds to answer the questions.
听力原文： The United States central bank has cut its main interest rate to the lowest level on record. But instead of cutting it by a fixed rate, it has opted for a target range, reducing it from 1% to between 0 and 0.25%. U.S. stock markets reacted positively. The New York Dow Jones Index closed up more than 4%. Our Washington correspondent Kevin Conolly reports.
It is a dramatic move from the Federal Reserve Board designed to signal both to Wall Street and to Main Street (6-1)the American authorities are doing eveuthing they can to fight back for the economy slides into recession. Interest rates in the US have now been cut by a full five percentage points in just over a year. (6-2) The plan is to make borrowing so cheap that liquidity returns to the economy and restores confidence and consumption levels. The outlook for the American economy remains bleak and the Fed says it's likely that rates will remain exceptionally low for some time.
Which is NOT the aim of the United States central bank to cut its main interest rate to the lowest level on record？
A．To make borrowing cheap.
B．To restore consumption level.
C．To curb people's enthusiasm for stocks.
D．To help liquidity return to the economy.
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
