IT IS USEFUL FOR THEIR WORK . B.TRUE OF FALSE(1,5PS)0,25 FOR EACH C...

3. - BAI KT 45 PHUT ANH 9 SO2
BAI KT 45 PHUT ANH 9 SO2

3. it is useful for their work .

B.True of False(1,5ps)0,25 for each correct one