Having a good education is a must in modern society, but having communication skills is _______ important.

A. equal

B. equality

C. equalise

D. equally

It is not easy to keep inflation at _______ when the unemployment rate is increasing.

A. beach

B. coast

C. bay

D. cape

1/ No doubt _______ it unpleasant to implement the new policies.

A. they will find

B. will the find

C. they do found

D. do they find

2/ Although he had talked to the twins for a long time, he couldn't distinguish one from _______.

A. another

B. others

C. other

D. the other

_______ that many measures have been recommended.

A. Such the serious risk of infection is

B. So the serious risk of infection is

C. Such is the serious risk of infection

D. So is the serious risk of infection

_______ such a stupid contract.

A. Under no circumstance we will sign

B. Under any circumstance we won't sign

C. Under no circumstance will we sign

D. Under any circumstance won't we sign

_______ that he put his hand into the boiling water

A. Such the boy was stupid

B. So the boy was stupid

C. Such stupid was the boy

D. So stupid was the boy

Only by keeping down costs _______ its competitive advantage over other competitors.

A. the company will maintain

B. and the company will maintain

C. will the company maintain

D. and will the company maintain

Đun nóng dung dịch chứa 81g glucozo với dung dịch AgNO₃ trong amoniac vừa đủ. Lượng bạc sinh ra cho tác dụng hoàn toàn với dung dịch HNO₃ loãng thì thấy thoát ra V lít khí (đkc) ko màu dễ hóa nâu ngoài không khí ( sp khử duy nhất). Giá trị của V là ?

Từ 200 kg gạo chứa 81% tinh bột có thể điều chế được V lít C₂H₅OH ( khối lượng riêng là 0,8g/ml). Biết rằng qúa trình điều chế xảy ra theo 2 giai đoạn sau :
(C₆H₁₀O₅)_n \(\underrightarrow{H=75\%}\) C₆H₁₂O₆ \(\underrightarrow{H=60\%}\) C₂H₅OH. V có giá trị là bao nhiêu ?