Do you know? Winter vacation homework for the fifth grade of elementary school.

1.Mayfly. 2.According to the Guinness Book of World Records, sea turtles can live up to 152 years.

3.Dian Bai. 4.Italy.

5.Water lily. Year.

7.It has a very early origin, from Mentejous, the last emperor of the Astica dynasty in Mexico.

1 mayfly. 2. The longest life expectancy is about 150 years.

3. Man-eating tree - Dian cypress.

4The tulip is the national flower of the Netherlands.

5 The national flower of Thailand is the golden chain flower.

6 The annual precipitation in the desert is only a few millimeters, and the highest record is 91 years without rain, so if you don't water the cactus, you will generally not die, and you will die if you water it.

7 Chocolate is a transliteration of the foreign word chocolate (once translated as "chocolate"). The main raw material is cocoa beans (coconut-like fruits, which will bloom and bear fruit on the trunk), its origin is very early, from the last emperor of the Astica Dynasty in Mexico, Monteru, at that time was a society that worshiped chocolate, like to add chili peppers, peppers, vanilla beans and spices to the drink, foam, and drink 50cc a day in ** cups, it is a drink belonging to the members of the court, its scientific name Theobroma has the meaning of "the drink of the gods", and is regarded as a valuable cardiotonic and diuretic medicine, It has an activating effect on proteolytic enzymes in gastric juice and aids digestion.

Well, you can ask your classmates or your peers about this.

The happiness of the river lies in irrigating the land and giving people happiness, so the river dances in the canal.

Before the New Year, after the New Year, I was calm and happy

My house is in a hurry to be dressed up

Mathematics and languages are inextricably linked. Can you use the following sets of numbers, each with an idiom? 7 out of 8 1 out of 100 1 out of 2 Can you still find a few sets of such number idioms on your own?

Try to write it down.

Solution 1: Let the side length of the square be x cm

The length of the rectangle is (x+3) cm and the width is (x-5) cm (x+3) (x-5)+75=x 2

x^2-2x-15+75=x^2

2x=60x=30

Square area = 30 * 30 = 900 square centimeters.

The radiator heats the surrounding air, the hot air rises, and the other.

Come and replenish, and in turn be heated, forming air convection, another: so the radiator should be installed in the lower part of the room, and.

It should be installed in the upper part of the room, so that the density of hot and cold air is different to form convection and speed up the transfer of heat.

The Eighteen Bends of the Yellow River (Modern Writer's Name) (Cold Fisherman.

Circle (name of a modern writer) (Repeat.

A person who aspires to cultivate the field (name of a modern writer) (Tian Xinzhen.

Spring is coming (modern writer's name) (Bino.

Tianya Fangcao (modern writer's name) (Biye.

Ploughing for Grandpa (Modern Writer's Name) (Sun Li.

State-owned forest (name of modern writer) (Gongmu.