Cột nước h1=20cm hình trụ có S khi đông đặc thành nước đá thì h2=? Đưa ra nhận xét .

Cho góc G1=60°, góc H1=120°. Chứng minh a//b

Giải thích Đơn giản Nhất có thể cho em câu này Đi ạ?

Vít calli" Mệt" Nl: đang ngồi full lại tranh vì hôm qua tô ko giống bản gốc, nay lại phải full lại mợt gkia í🤧👻

Hãy viết đoạn văn cảm nhận về bài thơ "Đồng chí"

help!!!!!!!!!!!! Question 24 : By the end of next year, Geoge_____English for 2 years. A. will have learned B. will learn C. has learned D. would learnQuestion 25 : When will you send the message? - We_____it by Friday. A. will deliver B. am going to deliver C. will be delivering D. will have delivered Question 26 : Can we start the party at 3 o'clock? - I don't think so. All our guests _____by then. I'm afraid. A. won't have arrivedB. don't arrive C. haven't arrived D. didn't arrive Question 27 : - What does a blonde say when she sees a banana skin lying just a few metres in front of her? - Oh dear! I_____. A. to slip B. will slip C. am sliping D. am going to slip Question 28 : Here is the weather forecast. Tomorrow_____dry and sunny. A. is going to be B. will be C. is D. would be Question 29 : Can I have a look at your photos tomorrow? - No, I'm sorry. I_____ them by tomorrow. A. will not develop B. shall not develop C. will not have developed D. am developing Question 30 : I know by the time they come to my house this evening, I_____out for a walk. A. will have gone B. will go C. will be going D. shall go Question 31 : These machines_____very well by the time you come back next month. A. will be working B. are going to work C. will have worked D. are working Question 32 : I hope they_____building the road by the time we come back next summer. A. are finishing B. will be working C. are going to work D. will have finished Question 33 : By 2020, the number of schools in our country_____. A. will double B. will have doubled C. are doubling D. shall double Question 34 : They_____the classroom by the end of the hour. A. are going to leave B. will be leaving C. will have left D. are leaving Question 35 : They_____pingpong when their father comes back home. A. will play B. will be playing C. play D. would play Question 36 : I’m going on holiday on Saturday.This time next week I_____on a beach in the sea. A. will lie B. am lying C. will be lying D. should be lying Question 37 : At 8 o’clock this evening my friends and I_____a famous film at the cinema. A. were watching B. will be watching C. have been watching D. watched Question 38 : They_____their presentation at this time tomorrow morning.A. are making B. are going to make C. will be making D. will make Question 39 : When they_____tomorrow, we_____in the sea. A. come - swim B. are coming - swim C. are coming - are swimming D. come - will be swimming Question 40 : She_____from the excursion by 6 o'clock. A. will have returned B. is going to return C. is returning D. will be returning Question 41 : We_____working for ten days when they pay our wages tomorrow. A. were going to be B. are going to C. will be D. will have been Question 42 : By the end of next month, I_____the project to the committee. A. will have presented B. will present C. will be presenting D. will have been presenting Question 43 : She_____the movie before you bring the DVD. A. is seeing B. will be seeing C. is going to see D. will have seen Question 44 : When you look through the small window, you_____that the safe is in its usual place. A. would discover B. discovered C. will be discovering D. will discover Question 45 : Tell him I_____anything with him until I have spoken with my wife. A. won’t discuss B. haven’t discussed C. don’t discuss D. didn’t discuss Question 46 : When I finish this course, I_____to the next level. A. have gone B. will go C. went D. would go Question 47 : She is really worried that she_____to the exam because she doesn’t have her identity card on her. A. haven’t admitted B. is not admittting C. hadn’t been admitted D. won’t be admitted Question 48 : My mom_____for two days by the time I see her. A. will have been travelling B. has been travelling C. will has been travelling D. has been travelled Question 49 : That cat_____you if you pull its tail. A. scratches B. has scratched C. will scratch D. is going to scratch Question 50 : I_____Alex your letter when I see her tomorrow. A. will send B. am going to send C. are sending D. shall send Question 51 : - What are your plans for the holiday? - I_____my grandparents and then go trekking in Sapa. A. am going to visit B. shall go C. will go to visit D. will go

Cho các oxit sau: Na2O; K2O; CaO; BaO; CuO; Fe2O3; MgO. Có bao nhiêu oxit tác dụng với dung dịch HCl? * 6 4 7 5

Trên quãng đường S nhất định, một chất điểm chuyển động nhanh dần đều không vận tốc ban đầu với gia tốc a mất thời gian T. Tính thời gian chất điểm chuyển động trên quãng đường này nếu chuyển động của chất điểm là luân phiên giữa chuyển động với gia tốc a trong thời gian T1=0,1T và chuyển động đều trong thời gian T2=0,05T

Giúp mik vs, mik cho 5* + camon + CTLHN nha :3 A = ( $\frac{4\sqrt{y}}{2+\sqrt{y}}$ + $\frac{8y}{4-y}$ ) : ( $\frac{\sqrt{y}-1}{y-2\sqrt{y}}$ - $\frac{2}{y\sqrt{y}}$ ) a, Rút gọn biểu thức A b, Tìm y để A = -2

Moi người ơi giúp em với em đan cần gấp ạ Ai làm nhanh nhất em cho 5 sao và ctlhn nha