下列有关金属资源保护的说法正确的是 2X)s0o,i+~+~2N1J*U+H*q/b*g9T)c1h0b;?2P,a'_-P'r5z-[)f1Q8P
A．金属资源是取之不尽用之不竭的1h0b;?2P,a'_-P'r5z-[)f1Q8P
B．可以用塑料代替金属制造水管1h0b;?2P,a'_-P'r5z-[)f1Q8P
C．用过的干电池可以随意丢弃1h0b;?2P,a'_-P'r5z-[)f1Q8P
D．回收利用一个铝质易拉罐的成本比新造一个要高，所以不用回收1h0b;?2P,a'_-P'r5z-[)f1Q8P