What bài thơ đâu

bị sao vậy

Khi chúng ta ăn chè, bánh trôi, bánh chay,... người bán thường cho thêm vài giọt dung dịch không màu, có mùi thơm được gọi là dầu chuối. Dầu chuối có tên hóa học là

A. isoamyl axetat

B. benzyl axetat

C. glixerol

D. etyl axetat

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Dictionaries frequently (A) explain the origin (B) of the defined (C) word, state its part of speech, and indication (D) its correct use.

A. frequently

B. origin

C. defined

D. indication

Có bao nhiêu este đồng phân cấu tạo của nhau có cùng công thức phân tử C₅H₁₀O₂ ? 

A. 6

B. 7

C. 8

D. 9

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Question 29: Some kinds of fish live in fresh water. Others live in sea water.

A. Some kinds of fish live in fresh water, for others live in sea water.

B. Some kinds of fish live in fresh water, and others live in sea water.

C. Some kinds of fish live in fresh water, or others live in sea water.

D. Some kinds of fish live in fresh water, so others live in sea water.