燃烧油投用要注意什么？
参考答案：
（1）再生密相温度大于燃烧自燃点；
（2）调节幅度要小，使用前脱尽水；
（3）床层必须淹没喷嘴。
按照英语描述，找出相应的人物
A B C D
( )1. John is a boy. He has short, brown hair. His eyes are blue.
( )2. David is boy. He has three hairs. He is green
( )3. Anne is a girl. She has long, black hair. Her eyes are brown.
( )4. Amy is a girl. She has short, blond hair. Her eyes are blue.
第三方物流的特征是什么？
