Có 3 dung dịch glucozơ, fructozơ, anilin đựng riêng biệt trong 3 lọ mất nhãn. Thuốc thử có thể dùng để phân biệt 3 dung dịch trên là 

A. dung dịch NaOH 

B. dung dịch phenolphtalein 

C. nước brom 

D. dung dịch AgNO₃ trong NH₃ 

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks.

Setting up and running a car company was an expensive business and required a lot of workers. A company that makes its money out of a smart app requires less capital, doesn't have to pay (25) _____ storage or transport in the way that car companies do and (26) _____ virtually no extra costs as the number of users increases. In the jargon of economics, the marginal costs per unit of output tend towards zero and the returns to scale are high. This explains why tech entrepreneurs can get very rich very young.

Technological change has always been (27) _____. There was a polarization of income and wealth in the first wave of industrialization at the beginning of the 19^th century, and this gave rise to political and institutional change over the 100 years between 1850 and 1950: the spread of democracy, the emergence of trade unions; progressive taxation and the development of social safety nets. These helped create bigger markets for the consumer goods that were spawned by the second Industrial Revolution: TVs, radios, vacuum cleaners and the like. (28) _____ over the past four decades a political model that both facilitated the spread of technology and provided some protection against its disruptive consequences has come under attack. Welfare states have become less generous, levels of long-term unemployment are much higher, taxation has become less progressive, and politics has increasingly been dominated by those with the deepest pockets (29) _____ can lobby the loudest.

Điền vào số (28)

A. However         

B. Therefore         

C. Otherwise         

D. But

79                    

Cây trong vườn có cường độ thoát hơi nước qua cutin mạnh hơn cây trên đồi vì:

I. Cây trong vườn được sống trong môi trường có nhiều nước hơn cây ở trên đồi.

II. Cây trên đồi có quá trình trao đổi chất diễn ra mạnh hơn.

III. Cây trong vườn có lớp cutin trên biểu bì lá mỏng hơn lớp cutin trên biểu lá của cây trên đồi.

IV. Lớp cutin mỏng hơn nên khả năng thoát hơi nước qua cutin mạnh hơn.

Số phương án đúng là:

A. 2

B. 3

C. 0

D. 1