Điều số thích hợp vào ô trống:

Cho hình hộp chữ nhật có diện tích xung quanh là 425 d m 2 , chiều cao là 12,5dm.

Vậy chu vi mặt đáy của hình hộp chữ nhật đó là c dm.

Tìm giá trị nhỏ nhất của hàm số y = 2 x − 1 x + 1  trên đoạn [1;3]

A.  1 2

B. 2

C.  5 4

D.  7 2

Kiểu phân bố ngẫu nhiên có ý nghĩa sinh thái là

A. tận dụng nguồn sống thuận lợi.

B. phát huy hiệu quả hỗ trợ cùng loài.

C. giảm cạnh tranh cùng loài.

D. hỗ trợ cùng loài và giảm cạnh tranh cùng loài.

Cho đoạn chương trình:

Kq:=0;

For i:=1 to 5 do

Kq:=Kq*i;

Kết quả sau khi chạy là :

A.0

B.120

C.60

D.20

Giải hệ phương trình  2 x   -   3 y   =   5 3 x   +   2 y   =   8

Read the passage and mark the letter A, B, C or D to answer the questions.

We first learn about loving and caring relationships from our families. Family is defined as a domestic group of people with some degree of kinship - whether through blood, marriage, or adoption. Ideally, each child is nurtured, respected, and grows up to care for others and develop strong and healthy relationships. This does not mean that it is always easy to make and keep friends; it just means that we share the goal of having strong relationships.

"Family" includes your siblings and parents, as well as relatives who you may not interact with every day, such as your cousins, aunts, uncles, grandparents, and stepparents.

These are probably the people you are closest to and with whom you spend the most time. Having healthy relationships with your family members is both important and difficult.

         Families in the 21st century come in all shapes and sizes: traditional, single parent, blended (more than one family together in the same house], and gay and lesbian parents -just to name a few. No matter the "type" of family you have, there are going to be highs and lows - good times and bad. Many times, however, families become blocked in their relationships by hurt, anger, mistrust, and confusion. These are natural and normal, and few families do not have at least a few experiences with them. The worst time for most families, is during a divorce. By making a few simple changes in the way we look at the world and deal with other people, it is possible to create happier, more stable relationships. Families need to be units of mutual caring and support; they can be sources of lifelong strength for all individuals.

According to the passage, which example below is probably NOT TRUE about the definition of family?

A. wife & husband relationship

B. god-mother & god-son relationship

C. step-father & daughter relationship 

D. nanny & baby relationship