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）
问答题
If 5 frogs catch 5 flies in 5 minutes, how many frogs are required to catch 50 flies in 50 minutes?
参考答案
参考解析
解析：
五只青蛙在五分钟内可捉到五只苍蝇，也就是说一只青蛙五分钟可以捉到一只苍蝇。因此，一只青蛙50分钟内可以捉10只苍蝇，要在50分钟内捉到50只苍蝇需要5只青蛙。
五只青蛙在五分钟内可捉到五只苍蝇，也就是说一只青蛙五分钟可以捉到一只苍蝇。因此，一只青蛙50分钟内可以捉10只苍蝇，要在50分钟内捉到50只苍蝇需要5只青蛙。
更多 “问答题If 5 frogs catch 5 flies in 5 minutes, how many frogs are required to catch 50 flies in 50 minutes?” 相关考题
考题
Youneedtoensurethatuserswhoenterthreesuccessiveinvalidpasswordswithin5minutesarelockedoutforfiveminutes.Whichthreeactionsshouldyouperform()
A.SettheMinimunpasswordagesettingtooneday.B.SettheMaximumpasswordagesettingtooneday.C.SettheAccountlockoutdurationsettingto5minutes.D.SettheResetaccountlockoutcounteraftersettingto5minutes.E.SettheAccountlockoutthresholdsettingto3invalidlogonattempts.F.SettheEnforcepasswordhistorysettingto3passswordsremembered.
考题
Your ERX router is supporting 100 virtual routers.A specific line module supports IP interfaces in 5 virtual routers.How many routing tables are maintained on that module?()
A.0B.1C.5D.100
考题
Why did the villagers agree to sell frogs?A. The frogs were easy money.B. They needed money to buy visitors.C. They wanted to please the visitors.D. The frogs made too much noise.
考题
A It was a village in India . The people were poor. However , they were not unhappy .After all, their forefathers had lived in the same way for centuries.Then one day. Some visitors from the city arrived. The told the villagers there were some people elsewhere who liked to eat frog’s legs . However , they did not have enough frogs of their own ,and so they wanted to buy frogs from other place.This seemed like money for nothing .There were millions of frogs in the fields around, and they were no use to the villagers. All they had to do was catch them .Agreement was reached ,and the children were sent into the fields to catch frogs. Every week a truck arrived to collect the catch and hand over the money. For the first time , the people were able to dream of a batter future ,But the dream didn’t last long.The change was hardly noticed at first, but it seemed as if the crops were not doing so well. More worrying was that the children fell ill more ofen, and, there seeemed to be more insects aroud lately.The vilagers decided that they couldn’t just wait to see the crops failing and the children getting weak. They would have to use the money earned to buy pesticides(杀虫剂) and medicines.Soon there was no money left.Then the peaple realized what was happening. It was the frog. They hadn’t been useless.They had been doing an important job---eating insects. Now with so many frogs killed, the insects wereIncreasing more rapidly. They were damaging the crops and spreading diseases.Now, the peaple are still poor.But in the evenings they sit in the village square and listen to sounds of insects and frogs.These sounds of the night now have a much deeper meaning .from paragraoh I we learn that the villagers __________.A．worked very hard for centuriesB．dreamed of having a better lifeC．were poor but somewhat contentD．lived a different life from their forefathers
考题
why did the villagers agree to sell frogs ?A the frogs were easy moneyB They needs money to buy medicineC they wanted to plwase the visitorsD．the forgs made too much noise
考题
Within the WMM policy， how many default QoS radio access categories are there？（）A、 8B、 5C、 4D、 3
考题
单选题A local newspaper company prints 520 pages of the newspaper every 30 minutes. How many pages will it print in 5 hours?A
2,600 pagesB
86.7 pagesC
5,200 pagesD
10,400 pagesE
1,300 pages
考题
问答题Known for their hunting skill, the heron feeds on fish, frogs, and crustaceans that it grabs with its spear-like beak. A B C DNo error E
考题
问答题How many minutes before midnight is it if one hour ago it was five times as many minutes past 9 pm？
考题
问答题There is one passage in this section with 5 statements. Go over the passage quickly and answer the questions on the Answer Sheet. For questions 1-5, mark Y (for YES) if the statement agrees with the information given in the passage; N (for NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. When was the last time you saw a frog? Chances are, if you live in a city, you have not seen one for some time. Even in wet areas once teeming with frogs and toads, it is becoming less and less easy to find those slimy, hopping and sometimes poisonous members of the animal kingdom. All over the world, even in remote jungles on the far side of the globe, frogs are losing the ecological battle for survival, and biologists are at a loss to explain their demise. Are amphibians simply over-sensitive to changes in the ecosystem? Could their rapid decline in numbers be signalling some coming environmental disaster for us all? This frightening scenario is in part the consequence of a dramatic increase over the last quarter of a century in the development of once natural areas of wet marshland: home not only to frogs but to all manner of wildlife. Yet, there are no obvious reasons why certain frog species are disappearing from rainforests in the Southern Hemisphere which are barely touched by human hands. The mystery is unsettling to say the least, for it is known that amphibian species are extremely sensitive to environmental variations in temperature and moisture levels. The danger is that planet Earth might not only lose a vital link in the ecological food chain (frogs keep populations of otherwise pestilent insects at manageable levels), but we might be increasing our output of air pollutants to levels that may have already become irreversible. Frogs could be inadvertently warning us of a catastrophe. An example of a bizarre occurrence regarding a species of frog dates from the summer of 1995, when “an explosion” of multi-coloured frogs of the species Rana klepton esculenta occurred in the Netherlands. Normally these frogs are brown and greenish-brown, but some unknown contributory factor is turning these frogs yellow and / or orange. Nonetheless, so far, the unusual bi- and even tri-coloured frogs are functioning similarly to their normal-skinned contemporaries. It is thought that frogs with lighter coloured skins might be more likely to survive in an increasingly warm climate due to global warming. One theory put forward to explain extinct amphibian species that seems to fit the facts concerns the depletion of the ozone layer, a well-documented phenomenon which has led to a sharp increase in ultraviolet radiation levels. The ozone layer is meant to shield the Earth from UV rays, but increased radiation may be having a greater effect upon frog populations than previously believed. Another theory is that worldwide temperature increases are upsetting the breeding cycles of frogs. Statements: 1．Biologists are unable to explain why frogs are dying out. 2．Attempts are being made to halt the development of wet marshland. 3．Frogs are important in the ecosystem because they control pests. 4．It is not known why Dutch frogs are changing colour. 5．It is a fact that frogs’ breeding cycle has been upset by worldwide increases in temperature.
考题
单选题What should you put in your diary?A
Some frogs.B
The date of World Wetlands Day.C
1971D
Any special day.
考题
问答题How many minutes is it before 12 noon if 90 minutes ago it was four times as many minutes past 9 am?
考题
问答题If 5 frogs catch 5 flies in 5 minutes, how many frogs are required to catch 50 flies in 50 minutes?
考题
问答题If two typists can type two pages in two minutes, how many typists will it take to type 18 pages in six minutes?
考题
问答题Two cyclists are racing up a mountain at different constant rates. Cyclist A is now 50 meters ahead of cyclist B. How many minutes from now will cyclist A be 150 meters ahead of cyclist B? (1) 5 minutes ago, cyclist A was 200 meters behind cyclist B. (2) Cyclist A is moving 25% faster than cyclist B.
考题
单选题How many places in America are mentioned in this passage besides New York City?A
6.B
4.C
7.D
5.
考题
问答题You are trying to fill a bath with both taps on, but have accidentally left out the plug. Normally the hot water tap takes 8 minutes to fill the bath and the cold water tap takes 10 minutes. However, the water empties out through the plug hole in 5 minutes. How long will it take for the bath to fill?
考题
单选题Most tree frogs change colors from time to time to fit in with its environment.A
MostB
changeC
from time to timeD
its
考题
问答题An employee at a company was given the task of making a large number of copies. He spent the first 45 minutes making copies at a constant rate on copier A, but copier A broke down before the task was completed. He then spent the next 30 minutes finishing the task on copier B, which also produced copies at a constant rate. How many total minutes would the task hare taken had copier A not broken down? (1) Copier A produced twice as many copies in its first 5 minutes of operation as copier B produced in its first 15 minutes. (2) Copier B produces 10 copies per minute.
考题
单选题Andy and Bob are picking apples. Andy picks 16 apples per hour and Bob picks 10 apples per hour. Assuming they pick at a steady rate, after 30 minutes, how many more apples has Andy picked than has Bob?A
3B
5C
6D
8E
10
考题
单选题Female frogs may not be attracted by the new call because _____.A
it is strange and unusualB
they are used to the old callC
the male frogs don’t know how to attract themD
lower frequency has special physical meaning
考题
单选题Why do some frogs change the pitch of its calls?A
To be different from others.B
To attract a female frog.C
To tend out messages.D
To go against traffic noises.
热门标签
最新试卷
