... =6[.1\3
3>
H>MF
*]
sometimes between 19
th
January and 20
th
February.
agrarian people
children
during the whole year.
Read the text again, and then decide whether the
statements are true (T) or false (F)
!"#$%&%'(")*+&%**)...
... to be nice and polite to each other because they
want to have good luck in New Year’s Day.
WHILE YOU READ
TASK 2: Decide whether the statements are
true (T) or false (F).
It falls between 19
th
... did Tet preparations and celebrations last
in the past?
It used to be spread over months.
3. What do streets look like before Tet?
Streets are decorated with coloured lights and red
banners....
... college. They hoped that with an education of science and
technology, their children could find a way of bettering their lives.
•
The children have met their parents’ wishes. When they came
back ... bettering their lives.
•
The children have met their parents’ wishes. When they came
back from college or technical high school, they introduced new
farming methods, which resulted in bumper...
... hợp chất tạo bởi:
Bài tập:
a. Cu (II) và O (II)
b. Na (I) và S (II)
c. Fe(III) và nhóm OH (I)
d. S(IV) và O (II)
Na
2
S
Fe(OH)
3
SO
2
CuO
Trong các công thức hoá học sau, công thức hoá học nào ... III, II, I, III
* Bài tập 1:
Chọn đáp án đúng:
- Viết công thức dạng chung: Na
x
(SO
4
)
y
- Theo quy tắc hoá trị: x.I = y.II
- Chuyển thành tỷ lệ:
- Vậy công thức hoá học là: Na
2
SO
4
x=2
y=1...