Chickens and rabbits in the same cage: there are 100 chickens and rabbits, 40 more feet than chickens, how many chickens and rabbits each? (use equation)

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• 1. There is no schoolbag on our desk There are 48 doctors in that hospital How do I say this?
• 2. There are eight bottles of mineral water, numbered from one to eight. Six of them are of the same weight and are qualified products. The other two bottles are all light five grams and are unqualified products. They are weighed three times with a balance. The results are as follows: the first one plus two is lighter than three plus four, the second five plus six is lighter than seven plus eight, and the third one plus three plus five is as heavy as two plus four plus eight. What are the two unqualified products?
• 3. It takes six hours for a bus to go from place a to place B, and eight hours for a freight car to go from place a to place B. the two cars leave each other at the same time. When they meet, the freight car runs 240km. How many km is the distance between a and B
• 4. The ratio of walking speed between a and B is 13:11. If a and B start from ab at the same time and walk in opposite directions, they will meet each other in 5 hours. If they walk in the same direction, How many hours does it take for a to catch up with B?
• 5. A and B set out from a and B at the same time. A rode a bicycle, B drove a car, and drove along the same route at a constant speed. After three hours of departure, they met. It is known that B traveled 90 kilometers more than a when they met, and arrived at a after 1:00. What are the speeds of a and B?
• 6. The two vehicles of a and B run relatively from two places with a distance of 600km. The vehicle of a runs 45km per hour, and the vehicle of B runs 40km per hour Car a starts 2 hours before car B starts. How many hours later will car B meet car a? First order solution of one variable
• 7. The distance between the two stations is 564 km. The two trains leave from the two stations at the same time. They met at 6 hours. The first train travels 46 km per hour. How many km per hour can the second train travel?
• 8. A car runs 140 kilometers in 2 hours. At this speed, it runs 5 hours from a to B. how long is the highway between a and B?
• 9. A and B start from ab at the same time, and continue to drive back and forth between ab. the speed ratio of a and B is 3:7, and the two vehicles meet for the first time in 2011 The point and the place where we met in 2012 are just 120 kilometers apart. How about the distance between the two places?
• 10. The mass ratio of cement in pile a and pile B is 5:3. If 7.8 tons of cement are transported from pile a to pile B, the mass ratio of cement in pile a and pile B is equal. How many tons of cement are there in pile a and pile B?
• 11. What is the formula for calculating an acre of land What is the formula of its length multiplied by its width
• 12. A number is both a factor of 64 and a multiple of 8. How many such numbers are there? A number is both a factor of 64 and a multiple of 8 emergency
• 13. How to read a phonetic sign with Z ending and s ending and plural? Do Z and s read / iz / when they are plural or third person?
• 14. This is the reaction word of this, the plural of boy, the third person singular form of be, the possessive case of Tom, the corresponding word of black and the phonetic sign of name Want words
• 15. Plurals of horse and house and their pronunciation What is the pronunciation of plural
• 16. The last phonetic sign is s, which is a clear consonant, followed by the plural s. I should read s, right? And the house [Haus] in the book changes to the plural house [hauziz]. Why? Is it because it ends with E and adds s, so read [iz]?
• 17. What's the phonetic sign of houses?
• 18. Plural form of stationery
• 19. What's the plural of "stationery"? Stationery or stationeries?
• 20. Lots of / a lot of is plural when it is followed by countable nouns, and singular when it is followed by uncountable nouns