quy đồng 7 3 2 5 ------ và --- ------ và------- 12 4 3 7

1 phòng học dạng hình hộp chữ nhật có chiều dài 10m,chiều rộng 5,5m , chiều cao 3,8m.Nếu mỗi người đều làm việc trong phòng đó thì cần có m3 không ? Khi thì có thể có nhiều nhất bao nhiêu học sinh trong phòng đó.Biết rằng,lớp học chỉ có 1 giáo viên và thể tích đồ đặt trong phòng chiếm 2 m3.

viết một bài văn khoảng 6 trang giấy chứng minh tình yêu quê hương trong bài thơ Quê hương giúp mình với, mình cảm ơn trước nha

Use the correct tense of the verb given - Simple Past or Past Progressive : 1. The children ______________ (TAKE) the cake when nobody ___________________ (LOOK) and ________________ (EAT) it silently. 2. First she ______________ (READ) the advertisement and then she ______________ (CALL) the company. 3. The sun ______________ (SHINE) brightly when the old man ______________ (SET) off from his cottage. 4. At eight o’clock yesterday evening the plane ______________ (FLY) from Tahiti to Los Angeles. 5. I ______________ (WAIT) for him for quite a long time but he ______________ (NOT COME). 6. Last weekend while Julie ______________ (TIDY) her bedroom, she ______________ (FIND) some of the toys she ______________ (HAVE) when she ______________ (BE) a child. 7. As she ______________ (CROSS) the street, she ______________ (SLIP) and ______________ (FALL). 8. Yesterday when I ______________ (WALK) in the park, I ______________ (LOSE) my watch. 9. The fishing boat ______________ (APPROACH) the seashore when the tornado ______________ (BEGIN). 10. I ______________ (CAN) not hear the bell because the radio ______________ (PLAY) really loudly. 11. The aeroplane ______________ (CATCH) fire just when it ______________ (TAKE) off. 12. While my mother ______________ (COOK) dinner, we ______________ (PLAY) in the garden. 13. We all ______________ (SLEEP) when some terrible noise _______________ (WAKE) us up. 14. Poor Cinderella ______________ (HAVE) to work hard while her step-sisters ______________ (HAVE) fun at the ball. 15. Professor Ward ______________ (GIVE) the lecture when the students’ riots ______________ (BEGIN). 16. When I ______________ (OPEN) the door, John ______________ (LIE) on the sofa. 17. One of my worst memories from last winter holidays was when I ______________ (RUN) out of petrol while I ______________ (DRIVE) through a snowy forest in the evening. 18. The lights ______________ (GO) out when we ______________ (DISCUSS) the plans for the following morning.

Vẽ sơ đồ thể hiện chức năng thu nhận sóng âm

Bài 2: Khoanh tròn vào đáp án đúng. 1. Are you (interested/ interesting) in classical music? 2. I always feel (exhausted/ exhausting) after long working hours. 3. The movie I saw last night was (excited/ exciting). 4. I find it (astonished/astonishing) you didn’t like sci-fi movies. 5. My sister easily gets (embarrassed/ embarrassing). 6. Tom, you look (tired/ tiring). What have you done? 7. I think all my teachers are (amazed/ amazing). I love them very much. 8. Last week, my father threw a (surprised/ surprising) party to celebrate my birthday. 9. I didn’t find the jokes at all (amused/ amusing). 10. Last year, I had a really (terrified/ terrifying) experience at the camp site. 11. I never find reading books (bored/ boring). 12. His wife looked (astounded/astouding) at the news. 13. Ann was (thrilled/ thrilling) to bits that she got the job. 14. This complicated system really makes me (confusing/confused).

Trong mặt phẳng chứa hệ trục tọa độ Oxy, cho hình bình hành ABCD có đỉnh A thuộc đường thẳng d: x= 1-t y=3+ 2t , B(0,1); C(5;3). Tính độ dài đoạn thẳng OA biết rằng đường thẳng AD đi qua điểm K(2,4)

Điền vào chỗ chấm: It's very interesting to learn .........schools in the USA.

Cần giải chi tiết câu 2 , cảm ơn

Viết hộ mình phản ứng của HCl tác dụng với Fe, Fe3O4, NaClO trong điều kiện thích hợp những phản ứng nào tạo chất khí ?