群落的组成单元是______

恒温动物的生长效率低于变温动物的主要原因是______。

承诺应当以______方式作出

“中国三大石窟艺术”是______。

He got a job with the corporation in 2000 and has worked there ______.

His eyes ______ tears when he listened to the sad story.

由个别到一般的论证方法是______

维持躯体姿势的最基本的反射是______

阅读李清照《声声慢》(寻寻觅觅)，然后回答。寻寻觅觅，冷冷清清，凄凄惨惨戚戚。乍暖还寒时候，最难将息。三杯两盏淡酒，怎敌他、晚来风急!雁过也，正伤心，却是旧时相识。 满地黄花堆积，憔悴损，如今有谁堪摘!守着窗儿，独自怎生得黑!梧桐更兼细雨，到黄昏、点点滴滴。这次第，怎一个愁字了得！

黄梅戏中的代表剧目是______。

阅读钱钟书《吃饭》中的一段文字，然后回答小题。 吃饭有时很像结婚。名义上最主要的东西，其实往往是附属品。吃讲究的饭事实上只是吃菜，正如讨阔佬的小姐，宗旨倒并不在女人。这种主权旁移，包含着一个转了弯的、不甚朴素的人生观。辨味而不是充饥，变成了我们吃饭的目的。舌头代替了肠胃，作为最后或最高的裁判。不过，我们仍然把享受掩饰为需要，不说吃菜，只说吃饭，好比我们研究哲学或艺术，总说为了真和送亲顺以利用一样。有用的东西只能给人利用，所以存在；偏是无用的东西会利用人，替它遮盖和辩护，也能免于抛弃。柏拉图《理想国》里把国家分成三等人，相当于灵魂的三个成分；饥渴吃喝等喷香欲是灵魂里最低贱的成分，等于政治组织里的平民或民众。最巧妙的政治家知道怎样来敷衍民众，把自己的野心装点成民众的意志和福利；请客上馆子去吃菜，还顶着吃饭的名义，这正是舌头对肚子的借口，仿佛说：“你别抱怨，这有你的份!你享着名，我替你出力去干，还亏了你什么?”其实呢，天知道——更有饿瘪的肚子知道——若专为充肠填腹起见，树皮草根跟鸡鸭鱼肉差不了多少!真想不到，在区区消化排泄的生理过程里，还需要那么多的政治作用。

土壤满足植物对水、肥、气、热要求的能力叫______。

It was very (considerable) (of) you (to send) me the information so (promptly),

I hear many parents complaining that their teenage children are rebelling. I wish it were so. At your age you ought to be growing away from your parents. You should be learning to stand on your own two feet. But take a good look at the present rebellion. It seems that teenagers are all taking the same way of showing that they disagree with their parents. Instead of striking out boldly on their own, most of them are clutching at (attempting to seize) one another's hands for reassurance. They claim they want to dress as they please. But they all wear the same clothes. They set off in new directions in music. But somehow they all end up crowded round listening to the same record. Their reason for thinking or acting in thus—and—such a way is that the crowd is doing it. They have come out of their cocoons(蚕茧) into a larger cocoon. It has become harder and harder for a teenager to stand up against the popularity wave and to go his or her own way. Industry has firmly carved out a teenage market. These days every teenager can learn from the advertisements what a teenager should have and be. And many of today's parents have come toward high marks for the popularity of their children. All this adds up to a great barrier for the teenager who wants to find his or her own path. But the barrier is worth climbing over. The path is worth following. You may want to listen to classical music instead of going to a party. You may want to collect rocks when everyone else is collecting records. You may have some thoughts that you don't care to share at once with your classmates. Well, go to it. Find yourself. Be yourself. Popularity will come—with the people who respect you for who you are. That's the only kind of popularity that really counts.

That is another topic that will come ______ discussion.

简述生态系统区别于一般系统的特点。

______ you don't like him is none of my business.