Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a: Xét ΔOAM vuông tại A và ΔOBM vuông tại B có
OM chung
\(\widehat{AOM}=\widehat{BOM}\)
Do đó: ΔOAM=ΔOBM
b: Xét ΔOEF có
OM là đường cao
OM là đường phân giác
Do đó: ΔOEF cân tại O
mà OM là đường cao
nên M là trung điểm của FE
hay FM=EM
File này hay nè,tham khảo thôi : Môn Toán:http://tin.tuyensinh247.com/de-thi-hoc-ki-2-lop-7-mon-toan-nam-2017-c30a32984.html và http://tin.tuyensinh247.com/de-thi-hoc-ki-2-lop-7-mon-toan-2017-thcs-sao-vang-c30a32945.html
Môn Văn:http://tin.tuyensinh247.com/de-thi-hoc-ki-2-lop-7-mon-van-2017-ba-dinh-c30a32968.html
Môn Anh:
|
Trường THCS:………………………… Họ và tên:………………………………. Lớp: 7…. |
THI HỌC KỲ II NĂM HỌC : 2010 – 2011 Môn thi : ANH VĂN - LỚP 7 Thời gian làm bài : 45 phút |
|
I/ Choose the word which doesn’t have the same sound as those of the rest. (1pt)
1/ a/ night b/ high c/ nice d/ ill
2/ a/ worked b/ helped c/ wanted d/ missed
3/ a/ dentist b/ helpful c/ sensible d/ serious
4/ a/ played b/ watched c/ arrived d/ returned
II/ Underline the best words: (3pts)
1. Very few Vietnamese people had TV sets (on / in / at / to) 1960s.
2. …………………………. – I’d love to.
a. Do you like to go swimming? c. Must we go swimming?
b. Would you like to go swimming? d. Will you go swimming?
3. Harry Porter is an (interesting / interestingly/ nervous / nervously) film.
4. He doesn’t like durians and (so / too / neither / either) does his father.
5. Milk is good (to / with / for / at) your health.
6. My mother bought spinach at the (vegetable stall / fruit stall / meat stall / bookstore).
7. She (received/ receives/receiving/receipt) a letter from her penpal Eddie three days ago.
8. How (high/heavy/ tall/ long) is your brother? – He is 40 kilos.
9. You should (go / went / to go / going) to bed early.
10. After dinner, my family usually (invent/watch/swim/gather) around the television in the living-room.
11. She’d like (to buy/ buys / buying / bought) some pork.
12. Video games (must / should / can / ought to) be addictive.
III. Do matching: (1pt)
|
A |
B |
|
1. Can you swim? 2. What sport do you like best? 3. Can I borrow your paddle 4. Let’s go somewhere for a drink. |
a. Table tennis b. Yes, I can. c. Yes, let’s d. Sure, here you are. |
Answer: 1………, 2………, 3……….., 4…………
IV. Read the following passage carefully, and then do the task below:
Nowadays, football becomes one of the world’s most popular games. Millions of people play and watch it around the world.
A football match often has two parts. Each part is forty-five minutes. The first part is the first half and the second part is the second half. There is a fifteen-minutes break between the two halves.
There are two teams in a football match. Each football team has eleven players, including a goal-keeper. The players on the ground try to kick the ball into the other’s goal. The team which scores more goals wins the match.
* Notes: include (v) bao gồm, goal-keeper (n) thủ môn, team (n) đội, nhóm, goal (n) khung thành, bàn thắng, win (v) thắng
Check True (T) or False (F) in the boxes: (1.5pts)
1. Today, football becomes very popular all around the world.
2. There is no break in a football match.
3. The winning team is the team scores more goal.
Answer the questions: (1pt)
1. How many parts are there in a football match?
....................................................................................................................................................................
2. Are there eleven players in each football team?
....................................................................................................................................................................
V. Make questions for the underlined words: (1.5pts)
1. I would like to see “Lion King” cartoon.
....................................................................................................................................................................
2. Huy was absent from class because he had a stomachache.
....................................................................................................................................................................
3. She sent the message to her friend by email yesterday.
....................................................................................................................................................................
VI. Rewrite these sentences, beginning with the words given: (1pt)
1. Khoa is a good tennis player.
=> Khoa plays ...............................................................................................................................................
2. Tuan likes soda and Huong likes soda.
=> Tuan likes..................................................................................................................................................
ĐÁP ÁN VÀ BIỂU ĐIỂM
I.Tìm từ có phần gạch chân được phát âm khác với các từ còn lại.
( 0,25 × 4 = 1 điểm)
1 C 2 B 3 A 4 B
II. Hãy chọn đáp án đúng nhất (A, B, C hay D) để điền vào chỗ trống trong mỗi câu sau. ( 0,25 × 8 = 2 điểm )
1. B 2.C 3. A 4.B 5.C 6.C 7.C 8 .C
III. Hãy đọc đoạn văn sau và trả lời câu hỏi. ( 0,5 × 5 = 2,5 điểm )
1. It’s going to be boring
2 (She is going to go shopping) on Saturday afternoon
3. (She is going to see a sick friend) in Canterbury Hospital.
4.She is going to cook dinner for her family.
5.No,she isn’t
IV. Dùng từ hay cụm từ gợi ý cho trước đê viết thành câu hoàn chỉnh.
( 0,5 × 5 = 2,5 điểm)
1.We are going to stay there for some days
2. I am going to watch a volleyball match on Saturday afternoon.
3.Why don’t your grandparents want to travel by plane?
4.He has some chickens and they produce a lot of eggs.
5.Who are you going to play badminton with?
V.Đặt câu hỏi cho phần gạch chân ở mỗi câu sau. ( 0,5 × 4 = 2 điểm)
1.What would you like?
2.How do you feel?
3.What is there for dinner?
4.How long are you going to stay in Hue?
Name :………................ Class : 7……….
Test 45’ ( the 2nd semester )
I/ Find the word whose underlined part is pronounced differently from the others(1p)
1. A. liked B. needed C. started D. wanted
2. A. slice B. time C. addictive D. life
3. A. computer B. bus C. amusement D. use
4. A. images B. houses C. cases D. games
II/ Choose ...............a suitable word to complete the sentence (1,5p)
1. Teenagers like………the latest pop music.
A. hearing B. hear C. to hear D. for hearing
2. Are you free ………………Tuesday evening?
A. on B. with C. in D. at
3. Nam often ……………….. an hour a day playing video games.
Ta có:\(\left(-5a^2b^4c^6\right)^7-\left(9a^3bc^5\right)^8=0\)
\(\left(-5\right)^7a^{14}b^{28}c^{42}-9^8a^{24}b^8c^{40}=0\)
Vì \(a^{14}b^{28}c^{42}\ge0\Rightarrow\left(-5\right)^7a^{14}b^{28}c^{42}\le0\)
\(a^{24}b^8c^{40}\ge0\Rightarrow9^8a^{24}b^8c^{40}\ge0\)
\(\Rightarrow\left(-5\right)^7a^{14}b^{28}c^{42}-9^8a^{24}b^8c^{40}\le0\)
Mà VP=0
Dấu "=" xảy ra khi
\(\left(-5\right)^7a^{14}b^{28}c^{42}=0\) và \(9^8a^{24}b^8c^{40}=0\)
\(\Rightarrow a=b=c=0\)
\(\Rightarrow A=a+b+c=0+0+0=0\)
,tuy mk vẽ hơi xấu nhưng các bn cố gắng giúp mk nha!!!!!!!!!!!!
Kẻ Cz//By (z thuộc nửa mặt phẳng bờ AC chứa B)
Ta có: góc zCB=góc CBy = 30 độ (so le trong)
Mà góc zCB + góc zCA=120 độ
=> góc zCA=90 độ.
=> Cz//Ax (cùng vuông góc AC)
Mà Cz//By => Ax//By
Giải chi tiết giùm mk. Mk cảm ơn trc!!!
\(xy+3x-y=6\)
\(\Rightarrow x\left(y+3\right)-y-3=3\)
\(\Rightarrow x\left(y+3\right)-\left(y+3\right)=3\)
\(\Rightarrow\left(x-1\right)\left(y+3\right)=3\)
Ta có bảng sau:
| \(x-1\) | 1 | -1 | 3 | -3 |
| \(y+3\) | 3 | -3 | 1 | -1 |
| x | 2 | 0 | 4 | -2 |
| y | 0 | -6 | -2 | -4 |
Vậy cặp số \(\left(x;y\right)\) là \(\left(2;0\right);\left(0;-6\right);\left(4;-2\right);\left(-2;-4\right)\)
Xét x=1=>vô nghiệm
Xét x khác 1 =>y(x-1)=6-3x
<=>y=\(\dfrac{6-3x}{x-1}\)
Vậy với x khác 1 thì mỗi giá trị của x luôn cho ta 1 giá trị tương ứng của y đồng nghĩa với có vô số cặp (x,y)
Cậu nào giải được giải giúp tớ với 
Tớ camon người giúp tớ nhiều lắm ạ 
\(\left(x-3\right).\left(x-2015\right)< 0\)
\(\Rightarrow\left(x-3\right)và\left(x-2015\right)\) phải khác dấu
\(\Rightarrow\left(x-3\right)< \left(x-2015\right)\)
\(\Rightarrow\left\{{}\begin{matrix}x-3>0\\x-2015< 0\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x>3\\x< 2015\end{matrix}\right.\)
\(\Rightarrow3< x< 2015\)
\(\Rightarrow x\in\left\{4;5;6;7;8;...;2013;2014\right\}\)
( ko bt đúng hay sai nx )
thám tử
\(\left(x-3\right)\left(x-2015\right)< 0\)
Với mọi \(x\in R\) thì:
\(x-2015< x-3\)
Khi đó: \(\left\{{}\begin{matrix}x-2015< 0\\x-3>0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x< 2015\\x>3\end{matrix}\right.\)
Nên \(3< x< 2015\)
Bài 1:
a: Xét ΔAMB và ΔAMC có
AM chung
MB=MC
AB=AC
DO đó: ΔAMB=ΔAMC
Ta có: ΔABC cân tại A
mà AM là đường trung tuyến
nên AM là đường cao
b: Xét ΔAHM vuông tại H và ΔAKM vuông tại K có
AM chung
\(\widehat{HAM}=\widehat{KAM}\)
Do đó: ΔAHM=ΔAKM
Suy ra: MH=MK
Xin lỗi ạ. Nhưng mk cần bài 2 ạ , xin lỗi zì đã lm phiền