Cho 15,3g oxit của kim loại hóa trị II vào nước thu được 200g dung dịch bazơ với nồng độ 8,55%. Công thức của oxt trên là : A.Na2O B.CaO C.BaO Mn giải chi tiết giúp mình với ạ

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I. Chọn đáp án đúng 1. Her new school is different …… her old school. A. of B. with C. from D. at 2. Is there a picture on the wall? ………….. A. Yes, there be. B. Yes, there is. C. Yes, there is not. 3. He works …… a hospital. He takes care …… patients. A. in / for B. in / of C. at / for D. for / of 4. What does your father do? …………… A. He’s farmer. B. He does a farmer. C. He’s a farmer. 5. His car is …… the shop. A. front of B. behind C. next D. near to 6. Do you work …… hours than Hoa? A. few B. less C. lesser D. fewer 7. She works six days …… week. A. in B. for C. a D. the 8. …… is it from your house to the market? A. How old B. How C. How far D. How long II. Sắp xếp lại các câu dưới đây 1. always / school / time / We / to / go / on. → ……………………………………………………………. 2. hours / week / often / does / How / he / many / a / work? → ……………………………………………………………. 3. not / American / uniforms / do / usually / school / wear / students. → ……………………………………………………………. 4. 10:00 / at / Wednesday / Science / Nam / on / has. → ……………………………………………………………. 5. interesting / I / because / Math / it / like / is. → ……………………………………………………………. 6. like / What / does / subject / best / Tom? → ……………………………………………………………. 7. you / work / to / want / we / with. → ……………………………………………………………. 8. there / excuse / a / ! / post / is / me / near / office / here? → ……………………………………………………………. 9. is / interested / Mai / experiments / doing / in. → ……………………………………………………………. 10. Huong / be / November 20th / , / twelve / on / will / Saturday. → …………………………………………………………….