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23 tháng 2 2021

e=0

học tốt nhé

1.      I                  was very tiredbecauseI                    all the day.A.haveworked                                                         B. have been workingC.hadworked                                                           D. had beenworking2.      Howlong                   able to drive? - Since1990.A.could you                      B. have youbeen            C. wereyou                      D. areyou3.      Whenshe                   thenoise, she                   down to...
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1.      I                  was very tiredbecauseI                    all the day.

A.haveworked                                                         B. have been working

C.hadworked                                                           D. had beenworking

2.      Howlong                   able to drive? - Since1990.

A.could you                      B. have youbeen            C. wereyou                      D. areyou

3.      Whenshe                   thenoise, she                   down to thekitchen and                  on the lights.

A. hears;goes;turns                                                   B. heard; went;turned

C. heard; wasgoing; turned                                      D. had heard; went; hadturned

4.      JaneandI                    school in1987.

A.finish                             B.havefinished               C. finishes                        D.finished

25. Pasteur                    in the 19thcentury.

A.wasliving                       B. lived                          C. had lived                     D. haslived

5.      When hecame,                  

A. I waswatchingTV.       B. IwatchedTV.             C. I amwatchingTV         D. I have watched TV. 27.Everyday, mysister the                   floor.

A.usually clean                  B.cleans usually             C.usually cleaned            D. usuallycleans

28.  Afterthey                   their breakfast,they                   shoppingyesterday.

A.have; go                         B. had had; go               C. had; hadgone              D. had had;went

29.  Father                  his pipewhile mother                    a magazine.

A.smoked;read                                                         B. was smoking; wasreading

C. hadsmoked;read                                                  D. smoking;reading

30.  When we came to the stadium, thematch                  

A.already begins.                                                     B. had already begun.

 

C.already began.                                                      D. have alreadybegun.

3
26 tháng 8 2021

1B

2C

3A

4D

25D

5B

27D

28C

29B

30A

26 tháng 8 2021

d b b d b a d d b b

13 tháng 3 2022

 

Dựng BG ⊥ AC.

Xét ∆ BGA và ∆ CEA, ta có:

ˆBGA=ˆCEA=90∘BGA^=CEA^=90∘

ˆAA^ chung

Suy ra: ∆ BGA đồng dạng ∆ CEA (g.g)

Suy ra: ABAC=AGAEABAC=AGAE

Suy ra: AB.AE = AC.AG   (1)

Xét ∆ BGC và ∆ CFA, ta có:

ˆBGC=ˆCFA=90∘;BGC^=CFA^=90∘

ˆBCG=ˆCAF;BCG^=CAF^  (so le trong vì AD // BC)

Suy ra: ∆ BGC đồng dạng ∆ CFA (g.g)

Suy ra: AFCG=ACBC⇒BC.AF=AC.CGAFCG=ACBC⇒BC.AF=AC.CG

Mà BC = AD (tính chất hình bình hành )

Suy ra: AD.AF = AC.CG            (2)

Cộng từng vế của đẳng thức (1) và (2) ta có:

AB.AE + AD.AF = AC.AG + AC.CG

⇒AB.AE+AD.AF=AC(AG+CG)⇒AB.AE+AD.AF=AC(AG+CG)

Mà AG+CG=ACAG+CG=AC  nên AB.AE+AD.AF=AC2

13 tháng 3 2022

có gì sai mong bạn sửa lại nha

 

I.                Phonetics.1. A. tear                                  B. beard                                   C. ear                     D. near2. A. career                               B. deer                                     C. bee                    D. beer3. A. near                                 B. bead                                     C. meat                              D. leap4. A. attendance                        B. independence                       C. librarian       ...
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I.                Phonetics.

1. A. tear                                  B. beard                                   C. ear                     D. near

2. A. career                               B. deer                                     C. bee                    D. beer

3. A. near                                 B. bead                                     C. meat                              D. leap

4. A. attendance                        B. independence                       C. librarian              D. efficient

5. A. property                            B. familiar                                 C. interior                D. attendance

1
26 tháng 7 2021

I.                Phonetics.

1. A. tear                                  B. beard                                   C. ear                     D. near

2. A. career                               B. deer                                     C. bee                    D. beer

3. A. near                                 B. bead                                     C. meat                              D. leap

4. A. attendance                        B. independence                       C. librarian              D. efficient

 

5. A. property                            B. familiar                                 C. interior                D. attendance

 

26 tháng 7 2021

câu 4 cái gạch chân là j z

11 tháng 2 2019

Đáp án: A

Giải thích: because of + N: bởi vì

Dịch: Anh ấy bị mụn nhọt vì ong đốt.

28 tháng 8 2021

D. Easy -> Easily

Read the passage below and decide whether the statements are TRUE or FALSE?If you've had a reaction to bee stings that suggests you might be allergic to bee venom, your doctor may suggest one or both of the following tests:Skin test. During skin testing, a small amount of allergen extract (in this case, bee venom) is injected into the skin of your arm or upper back. This test is safe and won't cause any serious reactions. If you're allergic to bee stings, you'll develop a raised bump on your...
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Read the passage below and decide whether the statements are TRUE or FALSE?

If you've had a reaction to bee stings that suggests you might be allergic to bee venom, your doctor may suggest one or both of the following tests:

Skin test. During skin testing, a small amount of allergen extract (in this case, bee venom) is injected into the skin of your arm or upper back. This test is safe and won't cause any serious reactions. If you're allergic to bee stings, you'll develop a raised bump on your skin at the test site.

Allergy blood test. A blood test can measure your immune system's response to bee venom by measuring the amount of allergy-causing antibodies in your bloodstream. A blood sample is sent to a medical laboratory, where it can be tested for evidence of sensitivity to possible allergens.

Question: If you've had a reaction to bee stings that suggests you might be allergic to bee venom, your doctor may suggest one or two tests.

A. True

B. False

1
30 tháng 4 2017

Đáp án: A

Giải thích: Dựa vào câu: “If you've had a reaction to bee stings that suggests you might be allergic to bee venom, your doctor may suggest one or both of the following tests”.

Dịch: Nếu bạn có phản ứng với vết ong đốt mà có dấu hiệu bị kích ứng, bác sĩ có thể sẽ khuyên bạn làm 1 hoặc cả 2 xét nghiệm sau.

2 tháng 2 2023

1d 2c 3d 4b 5a

2 tháng 2 2023

1 A bear(/eə/) B wear(/eə/) C swear(/eə/) D fear(/iə/)

2 A hair(/eə/) B fair(/eə/) C .chain(/ei/) D chair(/eə/)

3 A bee(/iː/) B been(/iː/) C seen(/iː/) D deer(/ɪə/)

4 A idea(/ɪə/) B pea(/iː/) C near(/ɪə/) D gear(/ɪə/)

5 A tear(/eə/) B appear(/ɪə/) C theater(/ɪə/) D shear(/ɪə/)

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