上海环保部门为了使城市生活垃圾得到合理利用,近年来逐步实施了生活垃圾分类投放的办法。其中塑料袋、废纸、旧橡胶制品等属于[ ]
A.无机物
B.有机物
C.盐类
D.非金属单质
答案:B
—Danny, where would you like to go during your holiday?
—I want to visit _____ in China.[ ]
A.
B.
C.
D.
生铁中含硫量炼钢铁≤()。
A.0.07%
B.0.05%
C.0.03%