... nguyên tử được liên kết chặt chẽ với nhau.Bài 3: Hãy so sánh sự khác nhau giữa tinh thể ion, tinh thể nguyên tử và tinh thể phân tử. Bài giải: Tinh thể Ion Nguyên tử Phân tử- Ví dụ Muối ăn… Kim ... 3,63.10-8cm.BÀI TẬPVỀTINH THỂ ION - TINH THỂ PHÂN TỬBài 8: (HSG QG 2008) Silic có cấu trúc tinh thể giống kim cương. 1. Tính bán kính nguyên tử silic. Cho khối lượng riêng của silic tinh thểbằng ... tử)ABCDaDCABEEa⇒4 ion Cl-⇒ 4 ion Cu+BÀI TẬPVỀTINH THỂ ION - TINH THỂ PHÂN TỬBài 2. Mạng lưới tinh thể của KCl giống như mạng lưới tinh thể của NaCl.Ở 18oC, khối lượng riêng của KCl...
... hat and left the room. (Anh ta đội nón lên và rời phòng)I have had my hair cut. (Tôi đi hớt tóc)She changed her mind. (Cô ta đổi ý)Tuy nhiên, trong một số thành ngữ, người ta lại thường dùng ... thường dùng mạo từ xác định the hơn là tính từsở hữu, nhất là những thành ngữ với in. Ví dụ:I have a cold in the head. (Tôi bị cảm)She was shot in the leg. (Cô ta bị bắn vào chân)He got red...
... doesn’t sound ………… very interesting lunch.3. I had………… very bad night; I didn’t sleep…………….wink.4. He is…………….vegetarian; you won’t get……… meat at his house.5. ………………travel agent would give you………… ... from……….shock shouldn’t be given anything to drink9. You’ll get………… shock if you touch ……….live wire with that screwdriver.10. It costs fifty-five and ……… half pence and I ve got ………….fifty pence ... to be called Mary.13. I have ………hour and…… half for lunch.~I only have… half………hour – barely ……… time for……….smoke and………cup of coffee. 14. I hope you have ……….lovely time and………good weather.~But...
... umbrellaC. umbrella D. an umbrellas31.I ve seen ______ good films recently.A. a B. the C. some D. an32.I often watch ______ television for two hours every night.A. some B. the C. any D. x33.The injured ... apple. The sandwich wasn’t very nice.A. the / an B. a / the C. a / an D. the / the39.I would love to live by _____ sea.A. the B. a C. an D. x40.What is ______ longest river in ______ world?A. ... you have a milk jug / milk jug? 7. The Prime Minister / Prime Minister will give a speech this afternoon.8. The computer / Computer has already changed our lives dramatically.9. I haven’t...
... Dia danh rong( the city, mai son )+ mot sotinh tu( in dept)+ bed(tren giuong)* On: + tren tiep xuc voi vat gi (the wall)+ ngay, ngay dac biet,ngay ngi,cuoi tuan( Monday,Tet,chrismasday,new ... sbapprove of st to sbagree withparticipate insucceed inprevent sb from doing stprovide withbeg for stborrow st from sbdepend ondie ofjoin inescape fromchange/ turn in towait forarrive ... foot2. It never snow here Christmas3. The country looks beautiful the spring4. I can see you . Monday5. She lives seaside.6. Have you got any money ?7. He always comes . Bus8. I have to learn...
... is located next_____ the museum of natural history on State Street. a. to b. for c. on d. with14. Many vegetables, including tomatoes, and corn, are native______ the New World. a. for b. to ... last year. a. with b. upon c. up d. to19. Thank you very much_____ what you have done for me. a. of b. up c. for d. about20. Bluegrass music is some what different______ other types of country ... a. of b. with c. to d. for15. The government is trying to make the country safe_____ terrorist attacks. a. from b. of c. at d. for16. Please put your stuff away to make room______ the new computer....
... Sebastian.12. The dog is swimming …………. the river.stop until very late …………. night! ………… the 31st of July I was very tired, so I went to bed early…………. the evening.F) Fill in the spaces in the invitation ... socks are ………… the drawer. Your shoes are……………. the bed.”3. Get ……… the bus! It’s about to go.4. The car ………… mine braked very hard and hit my car.5. You walk very fast. You’re always five ... got any lessons …………. the weekends.6. Sheila gets up …………. 6.30 every morning.7. Mike and his family go for a walk ………… the evenings.8. Michael has got a lot of posters and pictures ………… cars...
... children have grown _______ and left home.2. The computer isn’t working. It broke _________ this morning.3. My headaches have been much better since I gave ________ drinking coffee.4. I turned ... context.43. We have been learning English ________ five years. 44.Can you send it to me _______ fax?45. She’s never satisfied _________ what she has got.46. She wanted to borrow some books ______ ... was very rude_________ her.28. She was very angry_________ Tom.29. Fred is capable________ doing better work than he is doing at present.30. You get bored___________ doing the same thing every...