Aathween (8th) class k taalib ilm aik scientific exhibition mein aik tasveer k saamnay kharray
thay.
.
.
.
Aik larkay ne doosray se kaha: "Yahan iss tasveer mein bataya gaya hai k oxygen gas do so (200) saal pehlay daryaft ki gaee thi."
,
,
,
Doosray ne heran ho kar poocha: "Wah! Phir log iss se pehlay kis tarah saans letay thay?"
.
.
.
Aik larkay ne doosray se kaha: "Yahan iss tasveer mein bataya gaya hai k oxygen gas do so (200) saal pehlay daryaft ki gaee thi."
,
,
,
Doosray ne heran ho kar poocha: "Wah! Phir log iss se pehlay kis tarah saans letay thay?"
