Quần thể ngẫu phối nào sau đây đang ở trạng thái cân bằng di truyền?

A. 0,49AA : 0,50Aa : 0,01aa

B. 0,81AA : 0,18Aa : 0,01aa

C. 0,36AA : 0,16Aa : 0,48aa

D. 0,25AA : 0,59Aa : 0,16aa.

Một quả bóng da có dung tích 2,5 lít. Người ta bơm không khí ở áp suất 10 5 Pa vào bóng. Mỗi lần bơm được 125 c m 3  không khí. Biết trước khi bơm, trong bóng có không khí ở áp suất 10 5  Pa và nhiệt độ không đổi trong thời gian bơm. Áp suất không khí trong quả bóng sau 20 lần bơm bằng: (coi quả bóng trước khi bơm không có không khí).

A. 5. 10 5 Pa

B. 2,5. 10 5 Pa

C. 2. 10 5 Pa

D. 7,5. 10 5 Pa

It is possible that she will come to our party tonight.

A. She must come to our party tonight.

B. She may come to our party tonight.

C. She had better come to our party tonight.

D. She should come to our party tonight.

Một người gửi tiết kiệm 300 triệu đồng loại kì hạn 6 tháng vào ngân hàng với lãi suất 10%/năm thì sau 9 năm 9 tháng người đó nhận đc bao nhiêu tiền cả vốn lẫn lãi, biết người đó không rút lãi ở các định kì trước. Nếu có rút trước thời hạn thì ngân hàng trả lãi suất loại không kì hạn là 0.015%/ ngày 1tháng = 30ngày.

A. 0,978 tỉ đồng

B. 1,062 tỉ đồng

C. 1,147 tỉ đồng

D. 1,001 tỉ đồng

Read the passage below and decide whether the statements are TRUE or FALSE?

Nguyen Tri Hieu, 48, from HCM City has donated blood 71 times. However, he has set a goal of donating blood up to 100 times or until his health no longer allows him to.

“My mother died due to lack of blood for a transfusion when I was 20 years old. My family got together in an effort to donate blood to help her. We even bought blood from other donors, but it was not enough,” he recalled.

“I wasn't just my mother at that time, many patients were in desperate need of blood transfusions but the resources simply weren't there and they had to leave this world before their time.” said Hieu.

A few years after his mother passed away, Hieu decided to register to donate blood. Since the first time in 1997, Hieu has donated blood for 71 times, offering up the life-giving resource once every three months.

“There have been many times when I've donated blood to people in need of urgent transfusions. Once, when I was working, my friend at the blood bank called me to help a child at the Heart Institute. My boss immediately told me to go to the hospital.”

“I remembered all the times I've donated blood like that because if did not hurry, the patient’s life would be at risk," he said.

Hieu is also a registered organ donor. "I feel like I can give something, I don't need to keep it," he said. "I feel like I can give away anything, I should not keep it, how can I do it when someone might need it.”

Hieu was one of 100 donors who were honoured at a ceremony on Thursday for

Question: He always tries to help patient with urgent need of transfusion.

A. True

B. False

Choose the letter A, B, C or D to answer these following questions

Most of us are interested in one kind of sport or another, even if we don't go in for it actively. Lots of people take up a particular sport at an early age, for example tennis, skiing, or ice-skating. If they get up to a suitably high standard, they may go in for local competitions or even championships. But special training is hard work and most young people don't keep it up. Many of them opt out when they come up against tough competition.

To become a professional in any sport, you have to go through with a strict training schedule. And it's not easy! It means doing without some of life's little pleasures, too. For example, to build up your physical strength you may have to stick to a special diet and give up some of your favorite foods. Smoking and alcohol are out, and to keep fit you have to work out regularly every day.

Sometimes it all pays off, but the road to success is long and there are no guarantees. No wonder that countless young talents decide to settle for a regular job instead, and, as far as professional sport is concerned, for looking on as spectators.

Question: According to the passage, which of the following statements is true?

A. Few people take up a particular sport at an early age.

B. The road to success in sports is long but there are guarantees.

C. All of the people who play some sports can go in for local competitions or even championships.

D. There are many young talents who decide to settle for a regular job.

Sự biểu hiện triệu chứng thiếu nitơ của cây là

A. Lá nhỏ, có màu lục đậm, màu của thân không bình thường, sinh trưởng rễ bị tiêu giảm

B. Sinh trưởng của các cơ quan bị giảm, xuất hiện màu vàng nhạt lá

C. Lá non có màu vàng, sinh trưởng rễ bị tiêu giảm

D. Lá màu vàng nhạt, mép lá màu đỏ và có nhiều chấm đỏ trên mặt lá

Mệnh đề không đúng là:

A.  T í n h   o x i   h ó a   c ủ a   c á c   i o n   t ă n g   t h e o   t h ứ   t ự :   F e 2 + ,   H + ,   C u 2 + ,   A g +

B.  F e   k h ử   đ ư ợ c   C u 2 +   t r o n g   d u n g   d ị c h

C .   F e 2 +   o x i   h o á   đ ư ợ c   C u

D.  F e 3 +   c ó   t í n h   o x i   h ó a   m ạ n h   h ơ n   C u 2 +