mk mượn lớp 8

mk có nèk

Chất X có công thức phân tử C₉H₁₆O₄. Khi cho X tác dụng với NaOH dư thu được một muối mà từ muối này điều chế trực tiếp được axit dùng để sản xuất tơ nilon-6,6. Số công thức cấu tạo thoả mãn X là

A. 3

B. 4

C. 1

D. 2

A) Diện tích hình thang là :

   (20+40)*30:2=900(cm)

Diện tích tam giác ADC là :

   30*40:2=600(cm)

Diện tich tam giác ABC là :

   900-600=300(cm)

B)Tỉ số phần trăm của S ABC với S ADC là:

   300:600*100=50%

                     Đ/S:a)600cm,300cm

                            b)50%

Vietnam ethnic with four thousand years of history and the country, throughout history have the fine traditions are handed down from this life died. One of which is traditionally loving human spirit of solidarity is expressed by the proverb: "the fresh Leaves chopped beef tattered leaves".

As noted above, traditional human spiritual, loving caring, help each other at difficult is one of the oldest traditions of our nation.

About the proverb, this sentence has two layers of meaning, in terms of the class literally layers of meaning that one can see it immediately in every word that we need not infer anything. This class is in a tree, the leaves can heal "cover" for the leaves torn not heal to overcome a stormy battle that leaves the other loss not torn down. From this literally class, we can infer the meaning of the proverb class-the class definition is not shown directly and the reader must infer based on the literal class.With this proverb we can understand the meaning of it is talking about love, spiritual solidarity help each other at difficult, the tribulation. The rich, the poor, help the people to help the needy. Also, there are various ca dao, proverbs talk about the spirit of this phrase: "Elected commercial the same secret, however, taking my, that just like the other but overall a rig", or "mirror/people get coverage thing in one country have to hurt each other".

1. I usually stayed up late to watch football matches last year, but now I don’t.

I used to stay up late to watch football matches last year.

2. There were some trees in the field, but now there aren’t any.

There used to be some trees in the field.

3. Linda doesn’t live with her parents any more.

Linda used to live with her parents.

4. He not a poor many any more, but he become a rich businessman.

(Câu này hình như bạn ghi sai đề rồi)

5. They didn’t often go to cinema every Sunday last year.

They didn’t use to go to cinema every Sunday last year.

6. My hair now is much longer than that in the past.

In the past my hair used to be shorter.

7.I don’t have time to collect stamps as when I was in primary school.

I used to have much time to collect stamps when I was in primary school.

8. Did you often go to the beach when you lived in Nha Trang?

Did you use to go to the beach when you lived in Nha Trang?

9. Mr. Nam often went to work by motorbike, but now he goes to work by bus.

Mr.Nam used to go to work by motorbike.

10. There were traffic jams in street during rush hours, but now the street become wider.

There used to be traffic jams in street during rush hours.

\(=-\frac{11}{12}+1=1-\frac{11}{12}=\frac{1}{12}\)

**** **** 

1. We can't walk there. It's very far.

=> It's too far for us to walk there.

2. Let's play the volleyball tomorrow afternoon.

=> Why don't we play the volleyball tomorrow afternoon.

3. My aunt 's baby will be born in September.

=> My aunt is going to give her baby a birth in September.

4. I intend to visit Mui Ne this summer.

=> I'm going to visit Mui Ne this summer.

Dùng từ gợi ý viết lại câu

1. . Mr. and Mrs. Lam travel to Ha Noi by plane. (FLY)

=> Mr. and Mrs. Lam fly to Ha Noi.

2.

I'd like five hundred gram of fish. (KILO)

=> I'd like half a kilo of fish.