cho (O) và 1 điểm A nằm ngoài đường tròn. kẻ tiếp tuyến AB vs (O) ( B là tiếp điểm) và đk BC . trên CO lấy 1 điểm I (I khác C,O) đường thẳng AI cắt (O) tại 2 điểm D,E (D giữa A,E) H là trung điểm

1/ cm ABOH nt

2/ cm \(\frac{AB}{AE}=\frac{BD}{BE}\)

3/ đường thẳng d đi qua E // AO , d cắt BC tại K. cm HK//DC

4/ CD cắt AO tại điểm P, tia EO cắt BP tại điểm F . cm BECF là hình chữ nhật.

p/s: cần nhất câu 4 !!

tt

16/ some peopel have no ... beliefs (RELIGION)

17/ By the age of eighteen he was competely ... of his parents (DEPEND)

18/ America's ... production fell forr the fourth successive month (INDUSTRY)

19/ A school out fit is no longer ... (COMPEL)

20/ Many parents opposed the ... of the class into different people? (DIVIDE)

21/ Quebec wanted some form of ... from the rest to Canada (SEPARATE)

22/ I'm so ... you're going to visit my country(PLEASE)

23/ They ride their bicycles to the countryside for ... (PLEASE)

24/ This exercise seems ... (DIFFICULTY)

25/ The teacher asked each student to write a ... of his homework (DESCRIBE)

30/ the admitted that she had given an incorrect ... (INSTRUCT)

~ để 30 cho nó đẹp chứ số 26 hơi xấu ! ~

I) hình thức từ !

1/ we enjoy the ... atmosphere in the mosque. (PEACE)

2/the litte boy sat ... forr a few minutes. (SILIENT)

3/the teacher welcomes the ... from the students on any subject. (CORRESPOND)

4/read these ... carefully before talking thí medicime (INTRUCT)

5/Swimming is ... at my school (COMPEL)

6/ I try to keep meat ... from other food in the fidge. (SEPERATION)

7/ Jame hás ... knocked against the other car. (PURPOSE)

8/ the old man ... with the young man's impractical plan. (AGREE)

9/ Half of these ... are wrong (CALCULATE)

10/I'm just a beginner in ... with her (COMPARE)

11/ They are selling these toys at a very ... price (COMPETE)

12/ some peopel had the ... of being born into rich families (ADVANTAGEOUS)

13/ we need TV serials which give a good ... of different aspects of life (DESCRIBE)

14/ it is ... that Mrs Brown has kept many cats at home (BELIEVE)

15/ the editor welcomes ... from readers on any subjects (CORRESPOND)