After twenty years collecting stamps, Mike__________interested in them.

A. is not longer

B. no longer

C. no longer is

D. is no longer

Đây là cuộc nội chiến + đấu tranh chống sự xâm lược của pk châu Âu

Nhiệm vụ lật đổ chế độ pk. Mở đường cho chủ nghĩa tư bản phát triển. Đây là cuộc cm tư sản triệt để nhất

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the blanks.

Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business ___(5)___, involves the utilization of a  decision worksheet. Psychologists  ____(6)____  optimization compare the actual decisions made by people to theoretical ideal decisions to see how similar they are. Proponents of the worksheet procedure believe that it will yield optimal, that is, the best decisions ___(7)___ there are several variations on the exact format that worksheets can take, they are all similar in their essential aspects.

Worksheets require defining the problem ___(8)____ a clear and concise way and then listing all possible solutions to the problem. Next, the pertinent considerations that will be affected by each decision are listed, and the relative importance of each consideration or  consequence ___(9)__ Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision.

Điền vào số (6)

A. whose study    

B. who study        

C. whose studying 

D. who’s study

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

 If he hadn't wasted too much time, he __________ in his examination.   

A. wouldn't fail

B. won't fail

C. wouldn't have failed

D. would fail

Cacbon có thể khử bao nhiêu chất trong số các chất sau: Al₂O₃; CO₂; Fe₃O₄; ZnO; H₂O; SiO₂, MgO

A. 4.

B. 5.

C. 6.

D. 3.

Ta có g=v- vo/t

Tức 10= v/2

=>v=20

​Wt=1/2.m.v² =100

gọi số lần bơm là x (lần)

trạng thái 1:V1=0,1x(l) P1=1000000(pa)

trạng thái2: V2=2(l) Pa2=2000000(pa)

theo bôi- lơ..=>x=40

Cho hỗn hợp A gồm Al, BaO và Na₂CO₃ ( có cùng số mol) vào nước dư, thu được dung dịch X và chất kết tủa Y. Xác định thành phần chất tan trong dung dịch X

nHCl=2nH₂=2×0.4÷2=0.4

Al⁰==>Al⁺³+3e

a 3a

Fe⁰==>Fe⁺²+2x

b 2b

2H^-1+2e===>H2

0.4 0.2

==>3a+2b=0.4

CÓ 27a+56b=5.5

Giải hệ đc a=0.1 b=0.05

=>m_Al=2.7==>%m_Al=49.09

%m_Fe=50.91

VHCl=0.2 (l)

Mk cx ko chắc lắm vs c1