lợi:

+ Phân hủy các chất hữu cơ thành chất vô cơ cung cấp cho cây trồng.

+ Được ứng dụng trong công nghiệp, nông nghiệp và chế biến thực phẩm.

Hại:

+Vi khuẩn kí sinh gây bệnh cho người và vật nuôi

+Làm hỏng thức ăn và gây ô nhiễm môi trường.

Nhớ nhấn like cho minh nhé.

910010

1. Lớp đất trên bề mặt các lục địa

- Lớp đất là lớp vật chất mỏng, vụn bở, bao phủ trên bề mặt lục địa.

- Lớp đất có 3 tầng: tầng chứa mùn, tần tích tụ,tầng đá mẹ.

2. Thành phần và dặc điểm của thổ nhưỡng.

- Đất gồm 2 thành phần chính; thành phần khoáng và thành phần hữu cơ

- Chất mùn tạo ra độ phì của đất

+ Đất có độ phì cao là đất tốt

+ Đất có độ phì thấp là đất xấu.

3. Các nhân tố hình thành đất.

-Đá mẹ hình thành thành phần khoáng

-Sinh vật hình thành thành phần hữu cơ

-Khí hậu giúp cho quá trình phân giải các chất khoáng và hữu cơ.

có gì tích like cho mình nhé.

Doremon and some of those friends are Xe, Chai en and suka. They are also Nobita's classmates. Doremon always provides support to Nobita when Nobita has trouble with his friends. Doremon movie is an interesting movie because it provides many lessons and makes the audience imagine what is said in the movie. Doremon was broadcast on television since I was six years old and I never forget to watch it. Doremon is a great animated film.

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Mumps are a very common disease which usually affects children.

A. which

B. are

C. usually

D. common disease

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 11 to 20.
 All relationships go through difficult times. In the past, when married couples had problems they usually didn’t (11) _________. They had to either (12)_________ with each other or continue to live together in an unhappy relationship. Getting divorced wasn’t an option for most people due to economic and social reasons. Some people believe that this wasn’t such a bad thing. They say that relationships require hard work and (13)_________ . “If a relationship is going to last a lifetime, you have to keep working at it,” says Doreen, who is celebrating her fiftieth wedding anniversary this year. “It isn’t all roses and romance. (14)_________ perfect all of the time.

These days young people give up when there’s the (15)_________ argument.” Experts agree that communication is key. The most important thing is to (16) _________talking. How many times have you heard yourself say to (17)_________ , “If only you’d listen!” or “ I wish you (18)_________ do that!” The truth is, the (19)_________ couples talk, the better their relationship (20) _________be.

Điền vào ô 11

A. grow up                   

B. split up            

C. chat up            

D. make up

Environmental protection is not one's job but everyone's duty. Today's environment is polluted not only by smoke, greenhouse gases, but the environment is also polluted by people's littering. Environmental protection is very necessary because clean environment brings us fresh air, health for everyone. Every week, the school organizes general cleaning classes. Each of you prepares a mask, as assigned by your classmates to get their belongings: brooms, shovels, water buckets, mops. The teacher assigned our team to pick up rubbish around the floor, clean the floor .... The ladies in the mop cleaning the floor, wipe the table, wipe the study table, sweep the class. The men table the table neatly. After only 45 minutes, our class was clean and bright. You are quick to quickly complete the work assigned. Sweat sweat, but on the face of everyone who clearly demonstrates the joy of doing good work contributes to the class room cleanliness