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【单选题】下列有关普通洗衣粉与加酶洗衣粉的区别的叙述，正确的是（）
A.
普通洗衣粉中含磷，会污染环境
B.
表面活性剂只存在于普通洗衣粉中，会产生泡沫，可以将油脂分子分散开
C.
加酶洗衣粉中的酶制剂对人体有毒害作用
D.
加酶洗衣粉是将酶直接添加到洗衣粉中
【单选题】How to Use the Sense of Smell Our sense of smell, which we normally take for granted, is nowadays being increasingly used for purposes which might surprise us if we aware of them. One area in which sm...
A.
3) preferred ______.A. the smell of shoes to that of flowersB. the smell of flowers to that of shoesC. the shoes in the room with purified airD. the shoes in the room with appealing smells
【单选题】据报道，我国已有多个城市禁止生产和销售含磷洗衣粉(含三聚磷酸钠)，其主要原因是 [ ]
A.
磷元素有毒
B.
磷酸根离子水解使水体酸度增大
C.
磷酸根离子与某些阳离子形成沉淀，使水体浑浊
D.
含磷污水引起浮游生物大量繁殖，导致水体恶化