以下属抗代谢类抗肿瘤药物的是（）
A.洛莫司汀
B.氟尿嘧啶
C.丝裂霉素
D.长春碱
E.顺铂
参考答案：B
Having an outdoor meal is always fun, but it can also be damaging to the planet if ______.
A．planned not carefully
B．not planning carefully
C．not planned carefully
D．not to be planned carefully
食盐和纯碱是家庭厨房中常见的物品．请分别选用酸、碱、盐三种不同类别的物质做试剂，区别这两种物质（用三个化学方程式表示）．
（1）______．
（2）______．
（3）______．
