核型为47，XX，21的唐氏综合征（又称21-三体）儿，其双亲核型正常，则发病原因是

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总与一缕炊烟有关

写下这题目，仿佛又看到母亲从一缕炊烟中走出来，用树皮般粗糙的双手，拍打掉衣服上的灰尘，理净发丛里的草渣。然后静默在老屋的矮檐下，像一只窝旁守候的老鸟，若有所待地张望着村前的小路。时间往往是黄昏，彩霞满天；或傍黑，薄暮冥冥。父亲还在田地里劳作。我和妹妹走在回家的路上。那时，最迫切的愿望，便是能望见自家屋顶上的炊烟――那甜暖的香，再远，也能点亮了我们的眼睛和脸庞。

母亲等饭熟了，就在夕光薄岚里，在飘散的几缕炊烟中，默默地守望着。

其实,母亲所能煮的,也就是“饭”而已。自每年春三月下秧,到秋八月才有新谷入仓。在这段漫长的青黄不接的日子里,一天三顿,都只是红苕稀粥,或稀粥红苕。有时，就忍不住要冲母亲撒气。每到这时，母亲总是默然无语，仿佛她真是不该只煮出这样的饭食。

虽然如此，粮食却仍不够吃。吃饭时，母亲总是先给我们盛上满满一大碗，再舀自己的。饭桌上，母亲也总是坐在靠近灶屋那“挂角”（方桌的四角）的位置上。①捧了碗，慢腾腾地举箸援筷，似乎在品尝美味，又似乎难以下咽。每当看到父亲或我们的碗空了，便抢着去给我们添饭。倘若锅里也没了，脸上就又是一丝愁苦和讪然，沉重得令人至今难忘。那时，母亲最大的快乐，或许也和我们一样，就是逢年过节。因为，她终于能给我们煮出一顿好吃的饭菜来。饭菜终于上桌了，母亲便会兴奋地宣布：“开饭啰，开饭啰！”那时，母亲总是很少动筷，而是凝望着我们，嘴里喃喃着，说：“真想天天都能这样！”

终于能够天天都这样了。我和妹妹，却不能天天都吃到母亲做的饭菜了。我到外地求学了，然后工作了，成家了。妹妹也到异乡打工，然后出嫁了。母亲仍在老家，里里外外地忙碌着，一日三餐地烧火做饭。我们偶尔回家，母亲总要亲自下厨忙乎。②饭菜自然丰富多了，母亲脸上，却依旧常有黯淡和讪然。父亲来信讲，你妈每顿饭都要念叨，不知娃们吃饭了没。父亲又讲，家里杀了猪，心舌肚都留着。你妈说看啥时能回来，她做给你们吃。

“又见炊烟升起……”每听到这歌声，都恍惚觉得，有一缕缕绵绵的炊烟，在眼前袅袅地飘升起来，那淡蓝淡蓝的烟里，满是最平常的人间气息，朴素、温暖而芳香，叫人莫名地感动、惆怅。眼睛里，也禁不住一阵潮湿，依稀看见，我苍老而慈蔼的母亲，正站在老屋的矮檐下，站在一缕缕炊烟的背景前，远远地望我，暖暖地喊我。

那炊烟，我想，该就是母亲生命的光束了。而它，我知道，也正是我生命的初源

小题1:文章写了哪些与“一缕炊烟”有关的人事，请分条概括（5分）

小题2:请说说第一段中画线句子的含义和表达效果.(4分)

小题3:文中两处写母亲神情的句子句子有什么不同？请结合文章内容简要分析一下（4分）

①倘若锅里也没了，脸上就又是一丝愁苦和讪然

②母亲脸上，却依旧常有黯淡和讪然。

小题4:文章最后一段在全文中的作用是什么？（3分）

亚里士多德认为力是物体运动的原因，以下各说法中与该观点相矛盾的是（　　）

A．两物体从同一高度自由下落，较重的物体下落较快

B．在光滑冰面上运动的冰块不容易停下来，这是因为冰块受到的摩擦力很小

C．四匹马拉车比两匹马拉车跑得快，这说明，物体受到的力越大，速度就越大

D．用力推桌子，桌子会运动，停止推桌子，桌子就会静止，这说明运动需要力来维持

   When I lived in Spain, some Spanish friends of mine decided to visit England by car. Before they left, they asked me for advice about how to find accommodation. I suggested that they should stay at “bed and breakfast” houses, because this kind of accommodation gives a foreign visitor a good chance to speak English with the family. My friends listened to my advice, but they came back with some funny stories.

“We didn’t stay at bed and breakfast houses,” they said, “because we found that most families were away on holiday.”

I thought this was strange. Finally I understood what had happened. My friends spoke little English, and they thought “VACANCIES” meant “holidays”, because the Spanish word for “holidays” is “vacaciones”. So they did not go to house where the sign outside said “VACABCUES”, which in English means there are free rooms. Then my friends went to house where the sign said “NO VACANCIES”, because they thought this meant the people who owned the house were not away on holiday. But they found that these houses were all full. As a result, they stayed at hotels!

We laughed about this and about mistakes my friends made in reading other signs. In Spanish, the word “DIVERSION” means fun. In English, it means that workmen are repairing the road, and that you must take a different road. When my friends saw the word ‘DIVERSION’ on a road sign, they thought they were going to have fun. Instead, the road ended in a large hole.

English people have problems too when they learn foreign languages. Once in Paris, when someone offered me some more coffee, I said “Thank you” in French. I meant that I would like some more. However, to my surprise the coffee pot was taken away! Later I found out that “Thank you” in French means “No, thank you.”

小题1: My Spanish friends wanted advice about __________.

A．learning English

B．finding places to stay in England

C．driving their car on English roads

D．going to England by car小题2: I suggested that they stay at “bed and breakfast” houses because__________.

A．they would be able to practise their English

B．it would be much cheaper than staying in hotels

C．it would be convenient for them to have dinner

D．there would be no problem about finding accommodation there小题3:“NO VACANCIES” in English means__________.

A．no free rooms

B．free rooms

C．not away on holiday

D．holidays小题4:If you see a road sign that says “Diversion” in UK, you will__________.

A．fall into a hole

B．have a lot of fun and enjoy yourself

C．find that the road is blocked by crowds of people

D．have to take a different road小题5:When someone offered me more coffee and I said “Thank you” in French, I__________.

A．didn’t really want any more coffee

B．wanted them to take the coffee pot away

C．really wanted some more coffee

D．wanted to express my politeness

甲公司是一家家电企业，预计明年的每股收益可以达到5元，与甲公司类比的A公司是家电行业的一家成熟企业，其今年的每股收益是4.64元，分配股利1.65元/股，该公司利润和股利的增长率都是6%，β值为0.92。政府债券利率为7.5%，股票市场的风险附加率为4.5%，则若利用A公司的内在市盈率作为类比市盈率，则甲公司每股价值为 ( )元。

A．33.39

B．85.56

C．31.5

D．11.64

按用途不同，分离器可分为（）、（）和（）三种。