环境保护类英语作文标题【一】
在一般的社交信中，信内收信人的地址通常省略，但是在公务信函中不能。将收信人的姓名、地址等写在信头日期下方的左角上，要求与对信头的\'要求一样，不必再写日期。例如：
环境保护类英语作文标题【二】
一封信写完了，突然又想起遗漏的事情，这时用p.s.表示，再写上遗漏的话即可，要长话短说。通常在信末签名下面几行的左方，应于正文齐头。
注意：在正式的信函中，应避免使用附言。
环境保护类英语作文标题【三】
是写信人对收信人的称呼用语。位置在信内地址下方一、二行的地方，从该行的顶格写起，在称呼后面一般用逗号（英国式），也可以用冒号（美国式）。
（1）写给亲人、亲戚和关系密切的朋友时，用dear或my dear再加上表示亲属关系的称呼或直称其名（这里指名字，不是姓氏）。例如：my dear father，dear tom等。
（2）写给公务上的信函用dear madam，dear sir或gentleman（gentlemen）。注意：dear纯属公务上往来的客气形式。gentlemen总是以复数形式出现，前不加dear，是dear sir的复数形式。
（3）写给收信人的信，也可用头衔、职位、职称、学位等再加姓氏或姓氏和名字。例如：dear prof. tim scales, dear dr.john smith。
环境保护类英语作文标题【四】
Tiger is one of the most valueable animals to human beings today. It is somehow like a cat, but much bigger than it. It lives in the forest, and feeds on small animals.
Nowadays, the number of the wild tiger is becoming small and small. Maybe there will be no tiger any more if people continue cutting the trees, destorying the living environment or hunt the tiger just for the skin. We must stop all these mistakes. We should protect them, because the world without tiger is not a completed one.
Tiger is one of the most valueable animals to human beings today. It is somehow like a cat, but much bigger than it. It lives in the forest, and feeds on small animals.
Nowadays, the number of the wild tiger is becoming small and small. Maybe there will be no tiger any more if people continue cutting the trees, destorying the living environment or hunt the tiger just for the skin. We must stop all these mistakes. We should protect them, because the world without tiger is not a completed one.
