遗嘱继承最大的优点在于能够充分体现被继承人自己的意愿，不受法定继承规定的任何限制。（   ）

某同学做了如下实验：把点燃的一支蜡烛伸进盛有氧气的干燥集气瓶里，燃烧停止后，冷却，可观察到瓶内壁上有 ____附着，由此说明蜡烛燃烧产物中有 ____；取出蜡烛，向瓶内注入少量澄清的石灰水，振荡，可观察到的现象是 ____，由此说明蜡烛燃烧产物还含有 ____．

    What's this? It's letter(字母)P. What colour is it? It's green. What's this and what colour is it? It's letter E. It's brown. What's this letter? It's letter N. It's red. P—E—N. Is it“pen”? Yes, it is.

    I have a blue pen in my pencil case(铅笔盒). My pencil case is orange. This is my book. It's my Chinese book. It's in my bag. My bag is black. Look! The bag is on the chair. The chair is yellow. It's my chair. It's nice. I like it.