Cho hàm số y= -x² có đồ thị (P) và y= -2x+m có đồ thị là (d)

a) Xác định m biết rằng (d) đi qua điểm A trên (P) có hoành độ bằng 1

b) Trong trường hợp m = -3. Vẽ (P) và (d) trên cùng hệ trục tọa độ

7. The amusement centre is so small that they cannot .............. the demand of the local residents.

8. You don't need the fans on in the classroom. .................................., please.

A. Turn off it        B. Turn it off        C. Turn off them         D. Turn them off

9.  Tower blocks from the 60s and 70s could be             after Grenfell Tower fire.

A. got down              B. let down           C. turned down    D. pulled down

10.  The trip to the National Gallery has been        until next Friday.

A. put off                  B. looked into      C. turned up         D. found out

11. French is a................... language to learn than English is.

A. difficult                 B. more difficult    C. most difficult    D. more and more difficult

12. He drives ………..his brother.

A. more careful than                         B. more carefully          

C. more carefully than                      D. as careful as

13. The English test was  ………than I thought it would be.

A. the easier                            B. more easy        C. easier               D. easiest

14. Her office is ………..away than mine.

A. farther                       B. more far           C. father               D. farer

15.     “You must come to my party,” she told me.

     A. She told me I come to her party.                 B. She told me to come her party.

     C. She told me I had to come to her party.      D. She told me I came to her party.

16. He …………... that he was leaving that afternoon.

A. told me                      B. told to me        C. said me            D. says to me

17. She said to me that she.............. to me the Sunday before.

A. wrote                         B. has written       C. was writing      D. had written

18.  He asked, "Why didn't she take the final exam?" - He asked why..... the final exam.

A. she took                       B. did she take       C. she hadn't taken D. she had taken

19.My teacher suggested I............... harder to pass the exam.

A. studies                       B. study               C.studying               D. to study

20. We have suggested............... to London for this winter vacation.

A. going                         B. go                    C. should go          D. to go

21. I suggested that we................. Peter to the party.

A. should invite                 B. inviting            C.  to invite         D. Both A& B are correct

22. It's so cold outside. We suggest............ the window.

A. should close                  B. close                C. closing                   D. closeing

23. I want to talk with my teacher about my problems, but I have no idea …………..to start , ……….to talk to him.

A. what – where                 B. where – who     C. why- whom     D. where- how

24. I suffer from depression and anxiety, but I don’t know …. to get over my problems

A. what                              B. how                  C. where              D. which

25. He asked me …………..to buy this dress.

A. which                            B. what                 C. where              D. whose

26. Could you tell me ………….to sign my name?

A. who                               B. where                C. what                D. how far

Nung 400g CaCO₃ với hiệu suất phản ứng 75%. Tính thể tích CO₂ thu được (ở đktc) 

Help

Cho  ABC nhọn, các đường cao AD và BE cắt nhau tại H. Vẽ đường tròn

 ( O ), đường kính AH. Gọi M là trung điểm BC.

  a/ Chứng minh EM là tiếp tuyến của đường tròn ( O ).