Trên mặt phẳng cho 99 điểm phân biệt sao cho từ 3 điểm bất kì trong số chúng đều tìm được 2 điểm có khoảng cách nhỏ hơn 1. Chứng minh rằng tồn tại một hình tròn có bán kính bằng 1 chứa không ít hơn 50 điểm trong 99 điểm đó

I .complete the sentences

1)She and I arrivved at six.We arrived at............time

2)They have lived here for quiet a long time .But we have lived here longer .We have lived here .......... them

3)Everythings is wet in Spring .Spring is ............... seasons of the year

4)He is 20 .She is two years ...........him

5)Which book is .............. ,this one or that one? I'd like the cheap one

6)He ran fast but I ran twice.............him

I .complete the sentences

1) My salary is high but yours is higher your salary is ..............mine

2) He still smokes but he smoked a lot .He smokes now.................he used to

3)You made a mistake and i also made that mistake .I made ...........mistake ............you

4) Tom and Dick are both intelligent students .Tom is.............Dick

5) He and she are both 20 years old .They are ............age

6)Mr .Brown's garden is twice.............big.............mine

1.cho p,q nguyên tố tìm x,y ∈ N*thỏa mãn \(\frac{1}{x}+\frac{1}{y}=\frac{1}{pq}\)

2.tìm x,y ∈ Z, p nguyên tố thỏa mãn \(x^4+4=p.y^4\)

1.cho p,q nguyên tố tìm x,y ∈ N*thỏa mãn \(\frac{1}{x}+\frac{1}{y}=\frac{1}{pq}\)

2.tìm x,y ∈ Z, p nguyên tố thỏa mãn \(x^4+4=p.y^4\)

Give the correct form of the words in brackets

1.She had an.............(interest) essay

2.I can't run ...........(fast) than Tom

3.Tom speaks English very ............(bad)

4.I've got the .............(little) money of all

5.John didn't feel very ................(good) today

6.You must be.................(care) when crossing the road

7.How much is your new pocket .....................(calculate)?

8.She looked at me .......... (anger)