题干

下列有关生物分类单位的叙述,正确的是(  )

A:分类单位越小,所包含的生物种类越多

B:同一分类单位中,生物的特征是完全相同的

C:分类单位越小,所包含生物的共同特征越多

D:分类单位越大,所包含的生物的亲缘关系越近

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答案(点此获取答案解析)

C

同类题4

阅读下文,回答问题

兰草

       ①小时候,常常遇到一些女孩用“兰”字作名,干吗要用“兰”作名呢?我产生了好奇心,去问父亲。父亲说,兰是一种草,开的花特香,兰草貌似柔弱,但生命力极强,逗人喜爱,因此人们爱用“兰”为女孩子命名,希望她们像兰草一样娴淑温柔,美貌端庄,健康成长。父亲的话我似懂非懂,但产生了想见兰草的愿望。

       ②但家乡没有兰草,后来,我上了初中、高中,来到县城,那里也没有兰草。

       ③去年九月中旬,我们奉命来到了扒口行洪的小河口镇灾区救灾。行洪区的高处已经露出了水面。少数回归的群众,已在残堤上搭起了临时灾棚,等候着重建家园。为了迎接行洪区中小学生归校,我们急于了解学校的受灾情况。这是一所我十分熟悉的学校:雄伟的教学大楼,整齐的教师宿舍。特别是校园美化,全市有名。四季花香,长年青翠,满园秀色。而现在展现在我们面前的这所学校,除伤痕累累的教学大楼,依然倔强地挺立着,整座校园覆盖在厚厚的淤泥中。露出泥面的柏树、广玉兰、女贞树等,浑身泥土,成了朽木枯枝;至于那些名花们,早已杳无踪迹。一片泥沼,满目荒凉,看不到生命的迹象。我心里感到沉甸甸的。

       ④就在诅咒洪水的肆虐时,我眼前一亮,忽然发现远处的淤泥堆上,像是谁散落了十分鲜嫩的四季葱苗。远远望去,它们婀娜娇艳,翠润如玉。在这百里泥沼中不可能有四季葱苗!我不顾一切,从没膝深的淤泥中蹚了过去,走近一看,其中竟还有两朵三朵白色的小花。凑上去,一缕淡淡的清香,沁人心脾!我大声叫喊起来:这里有抗御洪水的英雄!同行的校长告诉我们,这堆淤泥下是一个圆形的大花台,周围种的是一圈兰草。淹水前这些兰草叶长不过五寸。竟意想不到,它会在两个多月的滔滔洪水底下,不断地从与日俱增的淤泥中挣出身子,突破了半米多深的淤泥封锁。在洪水退后,群芳寥落,校园一片死寂。独有这兰草、兰花,带着与洪水顽强拼搏后的疲劳与倦色,虽然减少了一些浓绿与浓香,却显得更鲜、更嫩、更加亮丽。我对这具有超强生命力的兰草,不禁肃然起敬。在温柔舒适的花园中,兰草恪守名份,娴静恬淡,默默奉献,丰富人间香与美,从不张扬;在荒山僻谷中,兰草仍然生机勃勃,奋发向上,散发出缕缕清香,不为沦落深山而自弃;在沧海横流,洪水滔天的绝境中,兰草威武不屈,奋斗不止,争得了自己的生存,获得了发展的先机。

       ⑤我抬起头来,远远望见守候在残堤上的父老乡亲们,心潮起伏,思绪难平。在父老乡亲的身上,我看到了兰草的秉性〖秉(bǐng)性:性格〗;在兰草的身上,我看到了父老乡亲的希望。

同类题5

任务型阅读

    Living with other people can be difficult, especially when each person has their own ideas about how they want to live. ____. Taking a few simple steps will help you share your living space harmoniously.

    Discuss your expectations ahead of time.

    ____. This applies to finances, food, possessions, use of common areas, loud activities or parties, quiet hours, and so on.

    Divide responsibilities.

    Make a plan to divide up responsibilities and chores(家常杂务)between you and your roommate. For example, if your roommate is a good cook and you are not, ____. It may also be a good idea to set up a chores schedule, where you will take turns cleaning the bathroom, raking out the trash and so on.

    ____.

    Not everyone has the same ideas about day to day living as you do. Take your roommate's feelings into consideration. For instance, if you are dying to throw a party on Thursday night but your roommate has a final early the next morning, agree to postpone the party till Friday evening, instead.

    Communicate effectively.

    Communication is key in making the relationship work. If a problem comes up, it's better to talk about it right away than to ignore it. For example, say “Chris, it upsets me when I wake up to find all the milk gone. If you use the last of something, can you please add it to the list?” If you simply cannot communicate openly and there is tension all the time,____.

A. Be prepared to compromise

B. Create a roommate agreement on Internet use

C. ask him or her to cook if you'll clean up afterward

D. you may as well find a new roommate

E. Though having a roommate can be challenging, it can also be enjoyable and fun from the other

F. People may have different religious or political views that could cause conflict

G. Talk about what each of you needs and wants in advance