Cho hình chóp(S.ABCD)có đáy(ABCD)là hình thoi nhưng không là hình vuông,(AB = SA = SB = SD = a). Biết rằng thể tích khối chóp bằng(frac{{{a^3}sqrt 2 }}{6}), khi đó góc giữa hai mặt phẳng(left( {SBC} right))và(left( {SCD} right))là – Sách Toán – Học toán Link Hoc va de thi 2021
Cho hình chóp tứ giác đều(S.ABCD),(O)là giao điểm của(AC)và(BD), biết. Gọi(alpha )là góc giữa(SA)với mặt phẳng((SBC)). Tính(sin alpha ). Câu hỏi: Cho hình chóp tứ giác đều(S.ABCD),(O)là giao điểm của(AC)và(BD), biết. Gọi(alpha )là góc giữa(SA)với mặt phẳng((SBC)). Tính(sin alpha ). A. (sin alpha= frac{4}{{sqrt {30} }}). B. (sin alpha= frac{2}{{sqrt {15} }}). C. (sin alpha= […]
Question 14: It is ________ of businessmen to shake hands in formal meetings. – familiar + to sb/ with sth: familiar with Eg: The smell is very familiar to everyone who lives near a bakery. – ordinary (adj): ordinary, ordinary Eg: ordinary people like you and me – common (+ to sb/ sth): common, common […]
Verse 37: The larger the apartment, the ________ the rent is. – Double comparison structure (more…more…) The + comparative form of adjective/adverb + S+ to be/ V, the + comparative form of adjective/adverb +S+ to be/ V Eg: The richer she is the more selfish she becomes. (The richer she gets, the more selfish she […]
You are here: Home / English test class 12 / Question 22: Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions. Rita enjoyed(A) to be able (B)to meet (C)several Parliament members during (D)her holiday. Link Hoc va de […]
Question 49: In the preparation of fibrous material for production uses, stiff woody fibers from plants _______________fibers from animal sources. Comparison of nouns: – Compare equals: S + V + as + much/many/little/few + N + as + N/Pronoun Eg: He has as many friends as I (do). (He has more deadlines than me.) – […]
Sentence 34: All the boys are good at cooking, but………………… ……..is as good as the girls. – None: is a pronoun; can be subjectEg: We hoped that they would come, but none came. (We were hoping they would come, but no one did.)We can use: None + of + N/pronoun.We have three daughters but none […]
Question 30: The police are……………… an incident which took place this afternoon. Prize:– inspect /ɪnˈspekt/ (v): inspect, inspectEg: The teacher walked around inspecting their work.– search (v): search, searchEg: I’ve searched high and low, but I can’t find my birth certificate. (I’ve searched everywhere, but I can’t find my birth certificate.)– look out ~ watch […]
Question 14: When she graduated from the university she got her_________________ __. – certificate(n): certificate: can be used in different fields such as birth certificate, marriage certificate, can be given to those who have mastered any skill in life , not necessarily related to education. (usually lasts several months) – diploma: certificate: only for the […]
Users were initially excited when Microsoft announced Windows 11 at the end of June, but it also brought many disappointments. So many people want to downgrade Windows 11 to Windows 10. Anyone with a compatible device can update Windows 11 in a variety of ways. You can find out more here. If you are not […]