√4x2 − 4x + 1 = 3 − x

Ç
3
√
8 −
√
18 + 5...
1
2
+
√
50å
.3
√
2

Arts on Walls Festival is a/an_________ graffiti festival in Greenwood.  

The business is _________ right in the center of the town.   

Over a million _________ go to Vivid Sydney every year.   

They’re having a small _________  for Dad’s birthday.   

The project’s aim is to clean up _________ rivers.   

Adolphe was a famous French _________ and the first one to publish a fashion book with 288 photographs.

We’re making our own Christmas _________ this year.   

1. People often reuse old newspapers.

    Old newspapers.

2. They went home because they were tired.

    They were     .

3. Polar bears will not have enough food to eat in the summer because fish will move to cooler sea.

    If fish    .

4. No other festivals are as interesting as this festival.

    This festival …………………………………………………………………………………………..one.

Trong các dãy chất sau đây, dãy chất nào gồm toàn acidic oxide?

A. SiO2, CO2, SO2, SO3, P2O5.    B. NO2, CO2, Fe3O4, SO3, N2O5.

C. CO2, SO2, SO3, Na2O, P2O5.    D. SiO2, CO2, MgO, SO3, P2O5.