The 30 U.S.gallon tank is cylindrical, it is protected from freezing by a 3 – pieces fiberglass blanket.in the above sentence,the "fiberglass blanket" means "玻璃纤维覆盖层".
A.1
正确答案是A
The 30 U.S.gallon tank is cylindrical, it is protected from freezing by a 3 – pieces fiberglass blanket.in the above sentence,the "fiberglass blanket" means "玻璃纤维覆盖层".
A.1
正确答案是A