Cho biết các gen liên kết hoàn toàn. Theo lí thuyết, quá trình giảm phân bình thường ở cơ thể có kiểu gen AaBb tạo ra tối đa bao nhiêu loại giao tử? A: 3 B: 2 C: 1 D: 4

g. 13,7 : ( X x 1,2) = 4,56 ( dư 0,02)

8. The river water is severely polluted, mostly …………… the dumping of raw sewage. A. because B. so C. lead to D. due to 9. If there ……….…… fewer cars on the road, there would be less pollution. A. is B. are C. was D. were 10. Unless you …………….. all of my questions, I can’t do anything to help you. A. answer B. answered C. are answering D. would answer

Khi dùng đòn bẩy, để lực kéo nhỏ hơn lực cản thì khoảng cách từ lực kéo đến điểm tựa phải thỏa mãn điều kiện nào ?

Cho mình giải bài tập tiếng Anh

Ở kì nào sau đây của quá trình nguyên phân, các NST đóng xoắn cực đại và tập trung thành một hàng ở mặt phẳng xích đạo của thoi phân bào? A: Kì đầu. B: Kì giữa. C: Kì trung gian. D: Kì sau.

Quan niệm nhân sinh của bài thơ vội vàng

II. Read and choose the correct answers. Preparation for Tet, Vietnamese New Year, starts two or three months before the actual celebrations. People try to pay off their debts in advance so that they can be debt-free on Tet. Parents buy new clothes for their children so that the children can wear them when Tet arrives. Because a lot of commercial activities will cease during the celebrations people try to stock up on supplies as much as possible. In the days leading up to Tet, the streets and market are full of people. Everyone is busy buying food, clothes, and decorating for their house. Each family prepares some special foods for the holiday. Those who live far away from home will try to come home to celebrate Tet with their family. Vietnamese families usually have a family altar to pay respect to their ancestors. During Tet the altar is thoroughly cleaned and new offerings are placed there. On New Year’s Eve, each home is thoroughly cleaned and decorated with flowers and offerings for ancestors by the night before Tet. Many people stay up until midnight to welcome the New Year or go to the pagoda to pray for luck, prosperity, and happiness. In the morning, actual Tet celebrations begin. The first day of Tet is reserved for the nuclear family. In big cities, the streets are usually empty as most people stay at home or leave the city to visit their close relatives in the countryside. Usually, children dress their new clothes and give their elders the traditional Tet greetings before receiving the lucky money. 1. This passage is about ________. A. New Year’s Eve C. the first day of the New Year C. preparation for Tet and Tet holiday D. paying debt before Tet 2. Vietnamese children ________. A.have to pay off debt before Tet B.should not receive any money during Tet C. are not allowed to wear new clothes at Tet D.receive lucky money from adults during Tet 3. Which is NOT mentioned as a preparation for Tet? A. visiting friends and relatives B. cooking special foods C.decorating houses D. paying off debts 4. Which is NOT referred during Tet celebration? A. going to the pagoda B. the increasing of commercial activities C.visiting relatives D. wearing new clothes 5. Vietnamese families ________. A.do not celebrate Tet if they are poor B.only celebrate Tet when they are wealthy C. have an altar to worship then ancestors D.gather in the streets on the first day of Tet

When light pollution happens, animals ……….…….. their behaviour patterns. A. change B. are changing C. will change D. would change

cho bieu thuc P = (can x) -1 / (can x) + 1. tim x de P co gia tri nguyen