1:Please post these letters. I wrote them this morning.

2:The building is the church. It's tower can be seen from a far.

3:He introduce me to his students. Most of them were from abroad.

4: The man called the police. His wallet was stolen

Combine the ideas given into a double comparative 1:When I write fast, my writing becomes illegible 2:She sings well. A lot of people admire her 3: She visted many countries. She had lots of friends 4:He works harder. He feels more tired 5:the value of a picture depends on how famous the artist is 6:how well I sleep depends on how late I go to bed 7:I don't spend much time with my family because I work so hard 8:the traffic moves very slowly as more cars come into the city 9:the idea becomes less attractive as I think about it more 10:the service of a hotel depends on how axpensive it is

Câu 1:Ở chương trình lớp 8 hidro thể hiện tính

A:Tác dụng với oxi

B:Tính oxi hóa

C:Tác dụng với kim loại

D:Tính khử

Câu 2:Nguyên liệu để điều chế hidro trong phòng thí nghiệm:

A:Từ axit và kim loại

B:Từ nước

C:Từ không khí

D:Từ axit HCI và kim loại Zn

Câu 3:Tính m(g)H2O khi cho 2,24(I)H2 tác dụng với 4,48 (I)O2(đktc)

A:1,92g

B:1,8g

C:4,32g

D:3,6g