When the area of a certain kind of artificial board or decorative artificial board used in interior decoration of civil construction engineering is at least greater than () m2, the free formaldehyde content or free formaldehyde emission of different products and different batches of materials shall be re inspected respectively.
A.200
B.500
C.700
D.1000
Answer:B
When the area of a certain kind of artificial board or decorative artificial board used in interior decoration of civil construction engineering is at least greater than () m2, the free formaldehyde content or free formaldehyde emission of different products and different batches of materials shall be re inspected respectively.
A.200 B.500 C.700 D.1000