Có 3 chất lỏng benzen, anilin, stiren, đựng riêng biệt trong 3 lọ mất nhãn. Thuốc thử để phân biệt 3 chất lỏng trên là :

A. giấy quì tím

B. nước brom

C. dung dịch NaOH

D. dung dịch phenolphtalein

Cho bột Fe vào dung dịch hỗn hợp NaNO₃ và HCl đến khi các phản ứng kết thúc, thu được dung dịch X, hỗn hợp khí NO, H₂ và chất rắn không tan. Các muối trong dung dịch X là

A. FeCl₃, NaCl

B. Fe(NO₃)₃, FeCl₃, NaNO₃, NaCl

C. FeCl₂, Fe(NO₃)₂, NaCl, NaNO₃

D. FeCl₂, NaCl

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

If cartoons are anything to go by, then the attitude of the British towards the family, and of British men towards the (31) ________ sex, has not changed much recently, despite attempts to shame people into admitting their prejudices. The mother-in-law, frequently of horrific (32) _______ and usually either about to visit, or being somehow driven from the house is still a favorite butt of this kind of humor. Marriage itself has been reduced to the skinny male, dominated by a massive female who habitually lies in wait with the rolling pin behind the door for the return of her drunken spouse. Children are rarely shown other than as screaming infants, or else as ill-favoured urchins who (33) _____ all their time being objectionable or asking for money. The old are simply (34) _____ as comic characters. The problem is, how do such cartoons relate to the way people truly see each other? Does a joke always contain some grain of truth, however much we may dislike to admit it? In other words, is life really a series of mother-in-law jokes? Or do jokes have a life of their own, with a (35) _______ of stereotypes we can recognize, like the Englishman with his umbrella and bowler hat, or the Frenchman with his striped jumper and beret?

Question 33

A waste

B. spend

C. take

D. pass

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

I walked away as calmly as I could.  _________, they would have thought I was a thief.

A. If so

B. Or else

C. In case

D. Owing to

Giải phương trình:  3 x   +   2 2   -   3 x   +   1 6   =   2 x   +   5 3

Xem hình 60.

Giải thích vì sao a//b.