Phân tích thành nhân tử (với các số x, y, a, b không âm và a ≥ b) 12 - x - x

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.

The ability to be independent is something that not everyone possesses. (25) _____, you need to be independent in order to survive in the world. Learning to support yourself is (26) _____ for any success you ever hope to achieve.

At the end of the day, you only have yourself to fall back on, so it is exceedingly important to be able to handle things on your own. It is all about being secure with who you are and what you believe in. It is extremely empowering knowing that you are (27) _____ control of your own life and your own choices. It is much more beneficial to listen to the voice inside yourself rather than the berating (28) of others.

We rely on others far more than it is necessary. People put their happiness in the hands of a significant other, thinking this will bring them fulfillment. This is a fatal error too many people make these days.

Do you always want to feel dependent on someone else? Of course not. Not only are you limiting yourself, you are more than likely becoming a burden to this person. We need to learn how to make decisions on our own. I understand asking your friends their opinion on a fashion decision, but do we really need to consult others on every minimal decision we have to make? Think of things (29) _____ are in your best interest and choose that option.

Điền vào số 29

A. what

B. why 

C. which 

D. that

Phân tích thành nhân tử (với các số x, y, a, b không âm và a ≥ b) a x - b y + b x - a y

Phương trình hóa học của thí nghiệm nào sau đây không tạo ra đơn chất?

A. Cho Fe vào dung dịch CuSO₄.

B. Sục O₃ vào dung dịch KI.

C. Cho Fe₂O₃ vào dung dịch HNO₃.

D. Cho dung dịch FeCl₃ vào dung dịch Na₂S.

Cho các chất sau: fructozơ, glucozơ, etyl axetat, Val-Gly-Ala. Số chất tác dụng với Cu(OH)₂ trong môi trường kiềm, tạo dung dịch màu xanh lam là 

A. 3. 

B. 2

C. 4

D. 1.