user-avatar
Casau1211
2 năm trước
Một bể nước có hai vòi nước. Khi bể không có nước, một mình vòi thứ nhất chảy thì sau 2 giờ đầy bể, một mình vòi thứ hai chảy thì sau 3 giờ đầy bể. Hỏi khi bể không có nước, mở cả hai vòi cùng chảy thì sau mấy giờ đầy bể? TRẢ LỜI: Khi bể không có nước, cả hai vòi cùng chảy thì sau …. giờ đầy bể. Mỗi đáp án nha Viết dưới dạng số thập phân
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

EXERCISES FOR UNIT 2 I. Choose the word or phrase (A, B, C, or D) that best fits the blank space in each sentence Câu 1: _________I speak to Mr. Brown? ~ Hold on a minute, please. A. Should B. Shall C. Can D. Will Câu 2: Her birthday is Friday, August 20th. A. at B. on C. in D. by Câu 3: __________ you have a test tomorrow morning? A. Will B. Do C. Are D. Shall Câu 4: __________will we meet? ~ In front of the school gate. A. Where B. When C. What D. How Câu 5: What’s your ? A. birth of day B. day of birth C. date of birth D. birth of date Câu 6: She always comes to class on time. She is never for class. A. late B. early C. free D. nervous Câu 7: Would you like a cup of tea? ~ . A. Yes, please. B. I like, too. C. Yes, I will. D. You’re welcome. II. Supply the correct tense or form of the words in brackets Câu 8: We often (play) tennis in the afternoon. Câu 9: (you be) free next Sunday? No. I (do) my homework. Câu 10: Phong (be) on the phone now. He (talk) to Tam. Câu 11: Mike (not come)__________ to our party tonight. Câu 12: We (have) a test tomorrow morning. Câu 13: She (not call) her parents every day. She (call) them every week. Câu 14: Would you like (see) a movie? Câu 15: Let’s (meet) in front of the movie theater. III. Rewrite the following sentences, beginning with words given Câu 16: What__________________________________________________________? My date of birth is on July 6th. Câu 17: What__________________________________________________________? My address is 263/2 Tran Phu Street. Câu 18: What__________________________________________________________? 38 950 963. Câu 19: How__________________________________________________________? It’s about 500 meters from my house to school. Câu 20: How__________________________________________________________? I walk to school.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team