IF THERE WILL BE TOO MUCH EXHAUST FUME IN THE AIR, OUR BREATHING WI...

1. - BO DE KIEM TRA ANH 9 1. - BO DE KIEM TRA ANH 9
BO DE KIEM TRA ANH 9

1. If there will be too much exhaust fume in the air, our breathing will be

A B C

badly affected.

D