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• Căn bậc hai số học của 9 là:

Câu 1: Căn bậc hai số học của 9 là: A. -3 B. 3 C. ± 3 D. 81

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Đại số 9. Chương I

• 60 phút
• 30 câu hỏi

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• Triệu chứng thực thể của K niêm mạc giai đoạn sớm thể loét: 

• Giá trị lớn nhất của hàm số y=x+4+4-x-4x+44-x+5  bằng

• (1,5 điểm)

  Nhận biết các dung dịch mất nhãn sau bằng phương pháp hóa học:

  NaNO3, Na2SO4, HCl, HNO3

• Phát biểu nào sau đây là đúng?

• Read the following passage and decide which answer (A, B, C, or D) best fits each gap. Write your answer in the numbered box.

  (0) has been done as an example. When faced (0)________ some new and possible bewildering technology change, most people (1)________ in one of two ways. They either recoil (2)________ anything new, claiming that it is unnecessary, or too complicated or that it (3)________ makes life less than human. Or they learn to adapt to the new invention and (4)________ wonder how they could possibly have existed (5)________ it. Take computers as example. For many of us, they still (6)________ a threat to our freedom and give us a frightening (7)________ of a future in which all decisions will be (8)________ by machines. This may be because they seem (9)________, and difficult to understand. Ask most people what you can use a home computer for, and you usually get vague answers about how ‘they give you information’. In fact, even those of us who are (10)________ with computer and use them in our daily work, have little idea of how they work. But it does not take long to learn how to operate a business programme, even if things occasionally go wrong for no apparent (11)________. Presumably, much the same happened when telephone and television became widespread. What seems to alarm most people is the (12)________ of technology change, (13)________ than change itself. And the objections that are made to new technology may (14)________ have a point to them, since change is not always an improvement. As we discover during power cuts, there is a lot to be said for the oil lamp, the coal fire, and forms of entertainment, such as books or board (15)________, which don’t have to be plugged into work. When faced (0)________ some new and possible bewildering technology change, most people (1)________ in one of two ways.

  For many of us, they still (6)________ a threat to our freedom and give us a frightening

• Sarah tried to pretend she was on a(n) ______ playground, where the kids waded in milk instead of sand and slid down thick, meaty poles.