Các máy cơ đơn giản A: luôn bị thiệt về đường đi B: lợi cả về lực và đường đi C: chỉ có lợi về lực. D: không cho lợi về công

Tìm những từ ngữ miêu tả rừng đước Nhận xét cách miêu tả của tac gia

Thực hiện phép tính(nhanh nếu có thể) a) -(12+21-23)-(23-21+10) b) 26.(-125)-125.(-36) c) 33.(17-5)-17.(33-5)

Cho tam giác MNP có MN=10cm, MP=8cm, NP=6cm. Chứng minh tam giác MNP vuông. Giúp mình nha. Cảm ơn nhiều lắm

Cho đường tròn (O; R), dây AB cố định (AB < 2R). Từ điểm M trên cung nhỏ AB (M không trùng với A và B) kẻ dây MN vuông góc với AB tại H. Gọi I, K lần lượt là chân của các đường vuông góc kẻ từ M đến AN và BN. a) Chứng minh: NI.NA = NH.NM. b) Chứng minh: MN là tía phân giác của góc BMI.

VIII. Rewrite each sentence, beginning with the words provided. 1. The weather isn’t fine. We can’t go for a walk in the woods  If ………………………………………. 2. I’ll ask someone to make a new dress  I’ll have ………………………………… 3. The bridge might be built in a hurry  People ………………………………...………. 4. You really should be able to dress yourself by now  It’s high time …………………………...……….. 5. I wish I hadn’t told him what we were planning to do that evening  I regret………………………………………. 6. I have never eaten with knives and folks before  This is ………………………………...……. 7. “Why don’t you ask Tom for help, Mary?” Ba said  Ba suggested ………………………...……….. 8. Ba is too young to see horror films  Ba is not…………………………...……. 9. They should quit smoking  They had ……………………………...……… 10. They once started these machines by hand.  They used to ………………………...……. IV. Find the mistake then correct it. 1. The road on which we are driving is built in 1990. 2. All writing was done with hand until the invention of the printing press. 3. The Browns are going to India in July and they would go to Spain later. 4. Rubber is used to making tyres and other elastic things. 5. The police asked her if she witnessed the accident and if she can recognize the guilty man. 6. Last year we went to Australia and stayed at my grandmother for two weeks. 7. I have learned English for five years. I think learning languages is a hard work. 8. She asked me how long does it take me to go to school by bus. 9. He told us that he was absent from class the day before because of his illness. 10. The taxi driver told me that he will take me to the hotel. IV. Find the mistake then correct it. 1. The teacher ordered us not open our book until she told us to do so. 2. He is angry about having not been invited to her birthday party. 3. John was upset last night because he had to do too many homework. 4.We wish we have a longer vacation but we don’t 5. He doesn’t have any informations about the departure and arrival time of today’s flights. 6. I wish I didn’t go there for my holiday last year. I didn’t enjoy it. 7. The mother asked her son what did he want for his birthday. 8. Throughout the United States there is fast food restaurants where hamburgers are served. 9. Each of the students in the class has to do their own assignment this semester. 10. Helen was proud for finishing the work in such a short time.

cho tam giác ABC, có AB=15cm, AC=20cm, BC=25cm. Đường phân giác góc BAC cắt BC tại D. Tỉ số diện tích của tam giác ABD và tam giác ACD.

Có những oxit sau CuO, K2O, SO2. Oxit nào có thể tác dụng được với a, nước b, axit clohidric c, ding dịch hidroxit

Choose the best answer to complete the sentence. _________ is not very far from here to the city center. (4 Points) That This It There

Hình sau mô tả cấu tạo của mô thần kinh: Picture 2 Trong 4 thành phần được đánh số từ 1 – 4 trong hình, những thành phần thuộc cấu tạo của một nơron điển hình là: A: 1, 2, 4. B: 1, 2, 3. C: 2, 3, 4. D: 1, 3, 4.