A：多用电子邮件、MSN、QQ等即时通讯工具，少用传真打印机属于“低碳生活”方式
B：我国神七宇航员所穿航天服主要成分是由碳化硅、陶瓷和碳纤维复合而成的，它是一种新型无机非金属材料
C：食品保鲜膜、一次性食品袋的主要成分是聚氯乙烯
D：使用纤维素和淀粉为原料制成的微生物降解塑料，可治理“白色污染”
中国地域辽阔，气候万千。下列叙述正确的是（ ）
若函数y=（m+2）x|m|﹣3是反比例函数，则m的值为____ ．
Hi, I'm John. There are four seasons in a year. I like them all. In spring, it's warm. There are pretty flowers everywhere. I often go on a picnic with my parents. Summer is hot. I often go swimming in the pool. I like to wear my sunglasses. In fall, the weather is cool. I can help my grandpa pick apples. Winter is white. I can make a snowman. And I can go skating, too.
海水晒盐过程中，析出粗盐后剩余的溶液成为“苦卤”，关于苦卤的下列说法不正确的是（ ）
