... :
1
z2yx
1
zy2x
1
zyx2
1
≤
++
+
++
+
++
ĐÁP ÁN
1
2
1
2
1
2
1
≤
++
+
++
+
++
zyxzyxzyx
Cách 1 : Ta có : (a – b )
2
≥ 0, ∀ a, b > 0 ( hiển nhiên)
⇔
)1(0,,
11
4
11
>∀
+≤
+
ba
baba
p dụng (1) ta có :
+
+≤
++
zyxzyx
1
2
1
4
1
2
1
... hoành độ điểm cực tiểu (hoặc d a vào bảng biến thi n). Do đó A
)2,
1
( m
m
là điểm
cực tiểu c a (C
m
)
Tiệm cận xiên c a (C
m
) là d : mx – y = 0
Ta có : d (A, d) =
12
2
1
1
2
2
1
2
2
+=⇔=
+
−
⇔
mm
m
mm
⇔ ...
2
1
x
; y’ = 0 ⇔ mx
2
= 1 (a)
Y có cực trị ⇔ (a) có 2 nghiệm phân biệt ⇔ m > 0
Khi đó : (a) có 2 nghiệm x =
m
1
±
. Vì y là hàm số hữu tỉ có hệ số góc c a tiệm cận xiên dương nên hoành...
... being awarded
c. was awarding
d. was being awarded
d
46. When I arrived, the train had left.
a. never
b. yet
c. already
d. suddenly
> c
47. - Mr. and Mrs. Foster finally saw a football game.
d. ... to this school.
a. have had
b. had had
c. had
d. could have
> a
38. That child needs help. She has lost both of her parents. She's
a. a lost child
b. a poor child
c. an orphan
d. a poor ... has been
d. had been
c
21. Lan seems to be a hurry.
a. in
b. at
c. on
d. with
> a
22. People don't learn languages overnight. Languages learned overnight.
a. aren't
b. haven't
c....
... be able to see each other every
afternoon.
I’ve bought a second-hand cassette-player. It isn’t as good as a language laboratory, but I
have been listening to myself at home and I’ve been able ... pages.
C. can write some pages in an airplane.
D. All are wrong
25. Ballpoint pens were invented:
A. in Hungary by two Hungarians B. in England by two Hungarians
C. in France by Bic’s company D. ... was……chilly…… children had to stay home last week.
A. very – that B. so – that
C. such – that D. such a - that
8. David wants to have his eyes tested. He goes to the………
A. Casualty Deparment B. dentist’s
...
... comes back home by bus.
4. Last Saturday, he came back home by taxi.
5. His wife was happy when he was back home.
6. He bought some steak at the butcher’s.
7. The baker’s didn’t have any bread.
8. ... Mrs. Warner: Yes.
Mr. Warner: Right. Um. …( 10 )…is it ?
Salesman: 1785. It’s a real bargain. You won’t regret it.
Mr. Warner: I hope you’re right.
.PART III : Listen to the story in the tape ... state whether these sentences are
TRUE or FALSE:
1. Mr. Brown usually goes shopping for his wife every Saturday.
2. He usually has a lot of drinks every time he meets his friends.
3. He usually...
... đ a
Trả lời :A
4. Bộ nhớ trong c a máy tính là:
A. ROM, RAM C. Đ a cứng, đ a mềm
B. Cache nhớ, đ a ZIP D. Đ a CD ROM, đ a Flash
Trả lời :A
5. Lệnh nào đại diện cho 4 tập tin BT1.TXT, BT2.TXT, BTA.DOC, ... lệnh bị sai
C. Sao chép tất cả các tập tin vào thư mục A: \
D. Sao chép các tập tin có phần mở rộng là DOC trong thư mục gốc đ a C: vào thư mục A: \BAITAP
Trả lời :A
3. Lệnh Format dùng để:
A. Định ... ĐỀTHI THỬ CCA
I. Phần Dos:
1. Lệnh ATTRIB + H A: \TINHOC có ngh a:
A. Gán thuộc tính ẩn cho các tập tin trong thư mục TINHOC C. X a thuộc tính ẩn cho thư mục TINHOC
B. Gán thuộc tính...
... birthday party, Sarha?” asked Frederic.
A. Frederic invited Sarha to his birthday party.
B. Frederic asked if Sarha was able to come to his birthday party.
C. Frederic asked Sarha if she ... requires a combination of academic knowledge and
practical skills that require learning throughout a lifetime.
51. Education is defined in this passage as a driving force of chance because
A. ... the passage?
A. Education and Jobs in the Past and at Present in the United States.
B. The Significant Role of Education in American Citizens’ Careers
C. Academic Knowledge and Practical...
... for……….
a. Ten year ago b. ten years c. last years d. last two years.
6. This computer is capable………designing sophisticated graphics.
a. In b. with c. of d. on
7. I…… you for years.
a. Haven’t ... a holiday last summer?
a. the mountain b. the sea c. the desert d. the city
27. He stayed in a ……….hotel.
a. nice b. bad c. old d. cheap
28. How many days did John spend on the beach?
a. 1 day ... was March.
a. I wasn’t been here since March
b. I wasn’t been here from March
c. I haven’t been here in March
d. I haven’t been here since March.
15. Do you think ………should pay more taxes?
a. ...
... DIADIEM, NGAYCAPGP, NGAYKC, NGAYHT)
-Mỗi phòng ban có một mã phòng ban và tên phòng ban
PHONGBAN ( MAPB, TENPB )
- Công ty phân công nhiều nhân viên tham gia công trình. Mỗi công trình có nhiều nhân ... viên có một mã số, một họ tên, một ngày sinh, một phái, một đ achỉ , chịu sự quản lý
c a một phòng ban và có một mức lương cho một ngày công.
NHANVIEN ( MANV, HTENNV, NGSINH, PHAI, DCHI, MAPB, ... viên tham
gia và mỗi nhân viên có thể tham gia nhiều công trình. Với mỗi công trình mỗi nhân viên có một số
lượng ngày công.
PHANCONG ( MACT , MANV, SLUONGNC )
CÂU 1: Đặt các thuộc tính Name, Type,...
... do this? – “It should be done _____ we did it
yesterday.”
A. the same way as B. as the same way as
C. as the same way than D. as the same way
13. –“Is your new house large?” – “Not really, ...
donations.
31- What does this notice concern?
A. dangerous roads.
B. safety precautions
C. help for flood victims
ĐỀ ÔN THI HỌC KỲ 1 DÀNH CHO KHỐI 10
MÔN ANHVĂN
( CÓĐÁP ÁN) ...
36. Mary rang hours and hours ago.
It’s hours since Mary rang
37. I think we should speak English in class.
I suggest speaking English in class.
38. I can’t sing beautifully, so I can’t...
... leading researcher in this area, people speak and
understand substantially the same “facial language”. Studies by Ekman’s group have
demonstrated that humans share a set of universal emotional expressions ... cheap temporary tables set up along the length of
it. Each girl has a small area littered with pots of orange make-up, tubes of mascara and long false
eyelashes.
As a place to work, it must rank ... Ekman is mentioned in the passage as an example of ________________.
A. lacked many main ingredients
B. researchers on universal language
C. researchers who can speak and understand many languages
D....