1. Whom does she fall .................love ………...........?2. Bill is jealous ..................anyone who has something he hasn’t.3. I was .................to go out when telephone rang4. Jim learns a lot ....................her brother, a well-known writer5.Have you got money ....................you?6.Please tell me ......................once!7.May I introduce you ......................Miss Brown?8.He was ill ..................a week and .....................that week his wife never...
Đọc tiếp
1. Whom does she fall .................love ………...........?
2. Bill is jealous ..................anyone who has something he hasn’t.
3. I was .................to go out when telephone rang
4. Jim learns a lot ....................her brother, a well-known writer
5.Have you got money ....................you?
6.Please tell me ......................once!
7.May I introduce you ......................Miss Brown?
8.He was ill ..................a week and .....................that week his wife never left his side.
9. Her step father is very kind ................ her.
10. I never go to school ................ foot.
11. The post office is................ the police station and the restaurant.
12. It's safe to keep medicine out ................ children's reach.
13. He lives ................ his parents ................ 23 Le Loi street ................ Ha Noi.
14. Is your father ................ home? - Yes, he is.
15. He fell................ love ................ a Japanese girl and got married ................ her last year.
a: Xét ΔAPE vuông tại p và ΔAPh vuông tại P có
AP chung
PE=PH
DO đó: ΔAPE=ΔAPH
Xét ΔAQH vuông tại Q và ΔAQF vuông tại Q có
AQ chung
QH=QF
Do đó: ΔAQH=ΔAQF
b: Ta có: ΔAHP=ΔAEP
nen góc HAP=góc EAP
=>AB là phân giác của góc HAE(1)
Ta có: ΔAHQ=ΔAFQ
nen góc FAC=góc HAC
=>AC là phân giác của góc HAF(2)
Từ (1) và (2) suy ra góc FAE=2x90=180 độ
=>F,A,E thẳng hàng
mà AE=AF
nên A là trung điểm của FE
c: Xét ΔAHB và ΔAEB có
AH=AE
góc HAB=góc EAB
AB chung
Do đo: ΔAHB=ΔAEB
Suy ra: góc AEB=90 độ
=>BE vuông góc với EF(3)
Xét ΔCHA và ΔCFA có
CH=CF
AH=AF
CA chung
Do đó: ΔCHA=ΔCFA
Suy ra góc CFA=90 độ
=>CF vuông góc với FE(4)
Từ (3) và (4) suy ra BE//CF