Cho hình chóp SABCD có đáy là hình thoi cạnh a, góc BAD = 120. Biết SA=SC=a,
SB=SD= 3a/2. Gọi M, I, J lần lượt là trung điểm AB, SD,CD; G là trọng tâm tam giác SAB.
Tính góc giữa hai đường thẳng:
1) SA và DC 2)SB và AD 3) SM và BD 4) BG và IJ
giúp mình câu số 4 với
1. Kevin thinks Italy is fascinating.
=> KEVIN IS FASCINATED ……. ITALY.
2. Will you allow me to leave the room?
=> ……. THE ROOM?
1. I’ve been here for two hours, and I am still waiting. (WAITING)
=> I ……. TWO HOURS.
2. Be careful when you leave the bus. (OFF)
=> BE CAREFUL WHEN YOU ……. THE BUS.
3. “I enjoyed myself yesterday,” said Brian. (DAY)
=> BRIAN SAID HE ……. BEFORE.
4. I know someone. This person likes you. (WHO)
=> I …….
5. Boots are not as comfortable as trainers. (LESS)
=> BOOTS ARE ……. TRAINERS.
6. In spite of losing thirty kilos, she’s still overweight. (HAS)
=> ALTHOUGH ……., SHE’S STILL OVERWEIGHT.
7. Anne has decided to buy fewer clothes from now on. (CUT)
=> ANNE HAS DECIDED TO ……. FROM NOW ON.
8. The wind was bending the young tree to the ground. (BENT)
=> THE YOUNG TREE ……. TO THE GROUND IN THE WIND.
9. “Could I borrow five pounds from you, Rose?” asked Nick. (LEND)
=> NICK ASKED ROSE ……. FIVE POUNDS.
10. The woman said that my uncle was a thief! (ACCUSED)
=> THE WOMAN ……. A THIEF!
11. Make sure you look after your little brother while I’m out. (CARE)
=> MAKE SURE YOU ……. YOUR LITTLE BROTHER WHILE I’M OUT.
12. This is the dog which won first prize at Crufts last week. (AWARDED)
=> THIS IS THE DOG ……. LAST WEEK.
13. “I’ll send you a postcard,” Carla said to Jill. (PROMISED)
=> CARLA ……. JILL A POSTCARD.
14. I’ve never seen such a beautiful sunset before. (I)
=> THAT IS THE ……. EVER SEEN.
15. The beach is close to the hotel, so we can walk there. (FOOT)
=> WE CAN ……. FROM THE HOTEL TO THE BEACH BECAUSE IT’S CLOSE.
1. Can you explain this word to me, please?
=> WHAT DOES ………………..?
2. It’s hard to find a good restaurant in this town.
=> A GOOD RESTAURANT ………………..
3. Where’s the post office?
=> I WONDER IF YOU COULD TELL ME ………………..?
5. I’m not sure whether Pablo will be there or not. (NOT)
=> PABLO ……………….. THERE.
1. When was the last time you had a check-up? (LONG)
=> HOW .......?
