Vợ chồng anh An ,chị Bình vừa có 2 con sinh đôi,1 nam ,1 nữ .Giả sử ở lần thụ tinh để có hai con anh An đã sử dụng 6 triệu tinh trùng .tính hiệu suất thụ tinh

Các câu hỏi liên quan

V. Combine the following sentences using an appropriate relative clause ẵ 1. This is the IELTS practice test book. I have told you about it. ................................................................................................................................................. 2. We have just moved to a new neighbourhood. There are a lot of English families there. ................................................................................................................................................. 3. Mrs. Nga has a friend. Her daughter is studying English in Australia. ................................................................................................................................................. 4. The English teacher is excellent. You met him at the meeting yesterday. ................................................................................................................................................. 5. I still remember the day. I first spoke to an English professor on that day. ................................................................................................................................................. 6. The man is a friend of my father. He helped me with my pronunciation. ................................................................................................................................................. 7. A student came late. I borrowed his English dictionary. ................................................................................................................................................. 8. The language is called Singlish. People speak it in Singapore. .......................................................................................................................................... 9. I recently went back to my school. I learned my first English words here thirty years ago. ................................................................................................................................................. 10. The lady is an interpreter. My mother has worked with her for a long time.