数列 2，5，11，20，x，47，…中的x 等于 A．27 B．28 C．32

阅读短文，根据其内容回答问题。

        Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away

or fight back. Plants certainly cannot run away, and they have no teeth and claws. But plants can defend (保护)

themselves by using both physical and chemical ways.

        Some plants have their own ways to keep animals away. For example, the leaves of the holly (冬青) plant

have sharp prickles (刺) that stop grass-eating animals. Holly leaves on lower places have more prickles than

leaves on upper places. This is because the lower leaves are easier for most animals to reach.

        Some plants, such as the oak tree (橡树), have thick and hard leaves that are difficult for animals to eat.

Some grasses may contain a sandy material, eating such grasses wears down the animal's teeth.

        Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an

unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals.

When a worm (虫子) bites a tobacco leaf (烟叶), the leaf produces a chemical smell.

        Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has

prickly leaves, and each prickle has poisonous water (毒液). Only one experience with this kind of plant will

teach an animals to stay away from it is the future.

1. Can plants move from place to place?

    ____________________________________________________________

2. Can plants defend themselves by physical ways or by chemical ways?

    ____________________________________________________________

3. Why lower holly leaves have more prickles than upper ones?

    ____________________________________________________________

4. How does tobacco defend itself against an attack from a worm?

    ____________________________________________________________

5. What kind of experience will teach an animal to stay away from a plant in the future?

    ____________________________________________________________

阅读下面的文字，完成后面题目。

沁园春　长沙

毛 * *

独立寒秋，湘江北去，橘子洲头。看万山红遍，层林尽染；漫江碧透，百舸争流。鹰击长空，鱼翔浅底，万类霜天竞自由。怅寥廓，问苍茫大地，谁主沉浮？

携来百侣曾游。忆往昔峥嵘岁月稠。恰同学少年，风华正茂；书生意气，挥斥方遒。指点江山，激扬文字，粪土当年万户侯。曾记否，到中流击水，浪遏飞舟？

小题1:对《沁园春　长沙》中的诗句及词语的解说，不确切的一项是(　　)

A．“独立寒秋，湘江北去，橘子洲头。”一落笔，诗人便将自己置身于长天秋水的大背景之中，当然也将读者带进了一个高远的深秋意境中。“独立”“湘江”“橘子洲”三词，点明了人物、时间、地点等要素，属于写实手法。

B．“看”这一动作，其对象包括“万山”“层林”“漫江”“百舸”——这是近观和远眺，还包括长天的鹰、水底的鱼——这是仰视和俯瞰。“红遍”“尽染”“碧透”，则展示出物象的广度、深度和透明度。

C．“万类霜天竞自由。”这不仅是对上述各物象的总结，也是将物象提升为意象的一个概括。“万类”中，无论是静态物，还是动态物，诗人均赋予它们灵性，一个“竞自由”，便使“万类”鲜活起来。

D．“指点江山，激扬文字，粪土当年万户侯。”“百侣”们在一起评论国家大事，写一些激浊扬清的文章，把当时的各路军阀看得如同粪土一般。小题2:下面对《沁园春　长沙》的赏析，不恰当的一项是(　　)

A．词牌，是词人填词所依据的曲调的名称。词牌的得名，大都有具体来源，如“沁园春”。宋以前的词均为单调；宋以后分上下阕，且又派生出长调、中调、小令。

B．上阕重在绘景，秋景虽然活泼，充满生机，而诗人的心情却是惆怅的，山河越是壮美，越使人感到人民不能主宰大地的可悲，越呼唤革命的到来。

C．词的下阕重在抒情，由“忆”追忆往事，极写豪迈之情，使下阕中的人物举动与上阕中的物象与意象相呼应，突现了“竞自由”的青年革命家的风貌，将诗的情调推向更美的意境。

D．诗人善于以色彩搭配来活画景物的盎然生机——词中集中写了红、绿、碧三色；且以“万”“层”“透”显示物象的深度，这样调动各种因素，从不同角度、不同层面所进行的描写，催生出读者全方位的美感享受。小题3:说说上阕“怅寥廓，问苍茫大地，谁主沉浮”的含义。

小题4:怎样理解“恰同学少年，风华正茂；书生意气，挥斥方遒”？

男性，80岁。右腹股沟斜疝嵌顿小时来诊，既往有可复往腹股沟斜疝史30年，检查：右侧腹股沟至阴10cm×6cm嵌顿疝，张力较高，皮肤无红肿首选的治疗方法是（）。

A.试行手法复位

B.手术复位并行疝囊高位结扎

C.手术复位并行加强腹股沟管前壁疝修补术

D.手术复位并行无张力疝修补术

E.手术复位并行加强腹股沟管后壁斜疝修补术

下面哪个选项用来添加用户定义用户登录的shell。（）

A、－s

B、－u

C、－l

D、－sh

关于血管内碘对比剂副反应救治的论述哪一项是错误的：（）

A.对于对比剂副反应一般采用对症治疗

B.症状不明显的轻度反应不必处理

C.注射对比剂发生副反应时就注意保留静脉内的针头

D.对于中度副反应病人的主要处理为留院观察

E.重度副反应的病人在CT检查室及时处理反应尽快转科治疗