Đặc điểm tiêu hoá ở thú ăn thịt là:

A. Vừa nhai vừa xé nhỏ thức ăn.

B. Dùng răng xé nhỏ thức ăn rồi nuốt.

C. Nhai thức ăn trước khi nuốt.

D. Chỉ nuốt thức ăn.

Cho số phức z thỏa mãn 3 - 4 i z = 2 + 3 i z z 2 + 2 + i , giá trị của z  bằng

A.  5

B.  10

C. 1

D.  2

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

        Speech is one of the most important ways of communicating. It consists of far more than just making noises. To talk and also be understood by other people, we have to speak a language, that is, we have to usecombinations of sounds (8)______everyone agrees to stand for a particular object or ideA. Communication would be impossible if everyone made up their own language. Learning a language properly is very (9)______. The basic grammar of English is not very large, and not only about 2,000 words are needed to speak it quite well. But the more idea you can (10)_____the more precise you can be (11)______their exact meaning. Words are the main thing we use in communicating what we want to say. The way we say the words is also very important. Our tone of voice can express many emotions and (12)______whether we are pleased or angry, for instance.

Điền vào số 9

A. easy

B. important

C. simple

D. expensive

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