bài 3
Authored by Do Hue
Science
1st Grade
Used 2+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
bạn sống ở đâu
ninh bình
hà nội
huế
đà nẵng
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Oxy có ntk bằng mấy
12
14
16
18
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
ký hiệu của nitrogen
N
O
K
H
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Nhôm có kí hiệu là gì
fe
n
Al
cu
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
khí nhiều nhất trong không khí là
O2
N2
H2
Cl2
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