Giải giúp mình mấy bài này vs

1. Phân biệt các chất khí không màu đựng trong cá lọ mất nhãn bằng phương pháp hó2a học: O_2,CO₂,SO₂,HCl

2. Khi cho 20g Y là muối Canxi Halogenua tác dụng với lượng dư Bạc Nitrat thì thu được 37.6g kết tủa Bạc Halogenua. Y có công thức là gì ?

3. Cho 1,2g một kim loại thuộc nhóm IIA, tác dụng với HCl thu được 0.672 lít khí (đktc). Tìm kim loại đó. So sánh tính chất hóa học của nguyên tố đó với K (giải thích)

Giải giúp mình nha

Cho (O;R), điểm M nằm ngoài (O) sao cho OM=2R. Từ M kẻ 2 tiếp tuyến MA,MB (A;B là tiếp điểm)

a) Tính \(A\widehat{O}M\) (sử dụng tỉ số lượng giác)

b) Tính \(A\widehat{O}B\); số đo \(\stackrel\frown{AB}\)nhỏ

c) OM cắt (O) tại C . C/M C là điểm chính giữa của \(\stackrel\frown{AB}\)nhỏ

1/ CORRECT FORM OF THE WORDS

1.Traffic jams in the city is getting more serious. It's hard to find a ............ (solve)

2. What sould we do to ..................... (preservation) the tradition?

3. It rained.................. in this region for three days (haevy)

4. He had an accident because he was a ..................... driver (care)

2/ COMPLETE THE PASSAGE WITH THE CORRECT WORDS IN THE BOX

Dear Gabby

Hello from New York! I'm ................... the city at last! I'm very busy, but I'm also very happy! As you know, New York is an ................ city. There is so much to do. Yesterday, my friend Sara and I went to a museum and ate in Chinatown. We took a subway everywhere. The subways were ................ than I thought. Today we're going to go on a tour by boat. It goes around Manhattan. We're going to see the Statue of Liberty

Our hotel is in good .................... so we can go to shopping places on foot . We are going to buy souvenirs tomorrow. We're also going to see a musical. The theater is near our hotel, but we're going to take a taxi because it's at night.

Love,Alicia

3/ Rewrite the sentences as directed

1. "Should I receive hispresent" she said (decide)

2. "Where can I buy the stamps?" he said (know)

3. They no longer play volleyball well (used)

4."What are you going to do tomorrow,Mai?" Peter said

5. There aren't any parks in your area (wish)

6. "Should we go out with them?" she said (decide)

7. "How can I get to the post office?" He said (asked)

8. They always played in the rain when they were young (used)

5."Do you want to visit My Son now?" Peter said

1/Circle the best word or phrase to complete the following sentences

1. Every nation has respect for their long-preserved.........(behaviuors/ practices/traditions)

2. Hand-writing letter is a pastime that is beginning to (die out/act out/turn out)

3. Teenagers in the past used to write their (own/private/themselves)thoughts in as diary

4. He is feeling abit (calm/depressed/delighted) about her study. She's failed her exam again

5. Would you like to go to the cinema? (How cool!/Sure/I can't imagine that)

6.Wedding is a (tradition/occasion/practice) for the bride and groom

7. In the past,my father used to (act out/dye/pull out) cloth with natural materials

8.Farmer in the vilage (pull/transport/spend) rice home on buffalo-driven carts

9.Parents should not have high (measure/expectation/frustration) about their children

10."You must have been really disappointed". (giving advice to some one/ empathise with some one/ assure someone)

11.I've won an essay contest. (Congratulations!/ It is interesting/ Oh poor!)

12.Physical changes are different for every, so you don't need to feel embarrased or (frustrated/tense/confident)

13.People had to work to (live/survive/entertain) the Artic winter

14. Marriages used to be arranged by parents. It expresses (agreement/appreciation/surprise)

15. Choose the word which has a different stress pattern

A.occasion B.musician C. designer D.atmosphere

A. entertain B. remote C.seniority

2/Supply the correct form of the verbs in brackets to complete the sentences

1.Hurry up! The bus ................. I don't want to miss it (come)

2. Everything is going fine. We ...................... any problems so far (not/have)

3.The noise from the trains................... me terribly last night (annoy)

4. Tom took a photograph of me while I ....................... (not/look)

5. I ................... them about the accident yet (not/tell)

6. The phone rang when I ................... a shower (have)

7. If you press that button, a receptionist .................... to help you (come)

1/COMPLETE THE SENTENCES WITH THE WORDS IN THE BOX :

pressures delighted graduate expectation expect disappoint relaxed

frustrated put oneself in one's shoes

Nowadays,teenagers suffer from different kinds of.....................,however a part of them is come from their parents.Particularly,several teenagers are trying their best to meet the...............of their parents,because they do not want to...........their parents.While there are some parents do not............their teenagers to do what they can hardly do.In my opinion,parents should be the ones who should make students feel.............If they are............or depressed with their bad grades,please don't get angry with them and let's..........................to understand how much tressful they are.

2.READ THE TEXT AND FILL IN THE BLANK WITH ONE SUITABLE WORD.

My mother came from Baffin Island.She used...............live in an igloo:a.............house...............from blocks of ice.The house had only...........room for all the generations:grandparents,parents,brothers,unmarried sisters,..........sometimes other relatives.Everyone worked together to...........the Arctic winter.Men went out hunting..........women stayed at home making clothes and preparing food.When they had to travel far,they............on................................night they used to.................themselves...........telling and acting out stories.They danced to drum music too.

II.MARK THE LETTER A,B,C OR D ON YOUR ANSWER SHEET TO INDICATE THE WORD OR PHRASE THAT IS CLOSEST IN MEANING TO THE UNDERLINED PART IN EACH OF THE FOLLOWING QUESTIONS.

1.She has been staying up late studying for the exam because she doesn't want to disappoint her parents.That's why she a bit tense now.

A.delighted b.left-out c.surprised d.stressed

2.I feel so depressed now and I wish my parents could put themselves in my shoes to understand I want to be a designer instead of a doctor.

A.stressed b.down c.confident d.calm

3.I suppose that Mai should take a break then start doing these hard assignments again,it would be better for her.

A.continue b.stay up late c.empathise d.rest

4.My parents said design graduater wouldn't find jobs easily and they wanted her to get a madical degree.

A.disappoint b.expect c.have occupations d.replace

5.I doubt that you can't understand her situation and help her feel better.

A.believe b.suspect c.compete d.advice

6.Tom bought a new camera for Mary to replace the one he had borrowed and lost.

A.alter b.empathise c.encourage d.assure

7.Tom assured me that this kind of problem wouldn't happen again.

A.failed b.experienced c.improved d.ensured

8.When you are in difficult situations ,you will need adult support and guidance to make informed decisions and overcome stress

A.change b.instruct c.operate d.develop

9.As a teenager,you should learn how to develop healthy habits.

A.create b.take risk c.deal with d.cooperate

10.Know how to cooperate with others and resolve conflict is one of the social skill which every student should have.

A.recognise b.concentrate c.deal with d.manage

Đem lai hai giống lúa, thu được F1 toàn cây cao,chín sớm. Cho F1 tự thụ phấn thu được F2 có kiểu hình là 304 thân cao, chín sớm : 101 cây thân thấp, chín muộn. Tìm kiểu gen của giống lúa, viết sơ đồ lai

-------------------------- Giúp mình với mình đag cần gấp-------------------------------------

Em có ý kiến về việc gian lận trong thi cử của tỉnh Hà Giang ? Nếu em là một trong những thí sinh đó em sẽ làm gì?

1/Đơn giản biểu thức:

a) Tan2α.(2 cos2α + sin2α -1)

b)(1 - cos α).(1 + cos α)

2/ Cho tam giác ABC có AB=6cm;AC=8cm;BC=10cm

a. Chứng minh tam giác ABC vuông

b. Tính góc B,góc C,đường cao AH

---------Giup mình nha-------------------

1/Đơn giản biểu thức:

a) Tan²α.(2 cos²α + sin²α -1)

b)(1 - cos α).(1 + cos α)

2/ Cho tam giác ABC có AB=6cm;AC=8cm;BC=10cm

a. Chứng minh tam giác ABC vuông

b. Tính góc B,góc C,đường cao AH

---------Giup mình nha-------------------