giúp em với , em sắp thi học kì rồi =(((

*Một cặp vợ chồng bình thường sinh ra 1 gái bình thường và 1 trai bị bệnh máu đông. Người con gái lấy chồng và sinh ra 1 gái bình thường , 1 trai bị bệnh. Người con trai lấy vợ bình thường và sinh ra 1 trai bình thường , 1 gái bị bệnh.

Hãy vẽ sơ đồ phả hệ và nhận xét.

B = \(\frac{1}{\sqrt{x-1}-\sqrt{x}}\) + \(\frac{1}{\sqrt{x-1}+\sqrt{x}}\) + \(\frac{\sqrt{3}-x}{\sqrt{x}-1}\)

a) Rút gọn

b) Tìm B khi x = \(\frac{53}{9-2\sqrt{7}}\)

c) Tìm x ∈ Z để B ∈ Z

d) Tìm x để B = 16

RÚT GỌN

A= x² - căn x / x + căn x +1 - 2x + căn x / căn x + 2(x-1) / căn x -1

ĐK ( x > 0 , x khác 1 )

Chọn từ thích hợp điền vào chỗ trống

*See/explain/call/feel/learn/go/play/eat/invest/complete*

1. It is normal to ........... tired after a long trip

2. It is difficult to ............. the piano well

3. It is impossible to .............. this project in 24 hours

4. It is not unusual to ............ traffic jams in Ha Noi

5. It would be an kward to ........ him again

6. It is not easy to ........... Japanese

7. It is difficult to ........... some grammatical riles

8. It was important to ............ clean and healthy food

9. It is dangerous to ............ cut after midnight

10. It is risky to ............ to much money on lattery

Nêu đặc điểm khí hậu của mùa đông nước ta.

Fill in each blank with a suible preposition.

1. The gold , silver , and bronze ................. took their places on the podium for the present ceremony. ( MEDAL )

2. ............................., dark clouds soon appeared and it began to rain. ( FORTUNE )

3. Laura blames her ............................... on being single , but I'm not so sure. ( HAPPY )

4. Many .................... of the older generation were there. ( REPRESENT )

5. She has cut herself , and it is ........................... quite badly. ( BLOOD )

6. His health was seriously affected and he suffered from constant ........................... . ( SLEEP )

7. Bao is .................. kind and generous to everyone. ( EXTREME )

8. I'm pleased to hear that you had an ..................... Christmas vacation. ( ENJOY )

9.This knife is ..................... - it can cut everything. ( USE )

10. The Scouting Association is the largest .............. youth organization in the world. ( VOLUNTEER )

Rewrite each sentence so that the meaning stays the same

1. My mother decorated the Christmas tree yesterday. ( Change into the passive voice )

=>................................................................

2. " I am waiting for the bus now" Ba said. ( Change into reported speech )

=>.................................................................

3. Could you give me the bag,please? ( Rewrite the sentence )

=>.................................................................

4. Learning English is very interesting ( Rewrite the sentence )

=>It's................................................................