题干

各种植物细胞通常具有一定的形态,这主要是因为(  )

A:细胞壁的保护作用

B:细胞膜的支持作用

C:细胞壁的支持作用

D:细胞膜的保护作用

上一题 下一题 0.0难度 选择题 更新时间:2018-02-07 10:14:20

答案(点此获取答案解析)

C

同类题1

阅读理解

    Embassy Suites by Hilton Sauta Ana Orange County Airport

Neighborhood: John Wayne Airport (SNA), Orange County 1325 East Dyer Road, Santa Ana, CA

    OVERALL GUEST SCORE

    Very Good

    Based on 163 Guest Ratings

Free Breakfast                Free Airport Shuttle

Fitness Center                Business Center

    Hotel Description

    Being close to airport and freeway access makes the Embassy Suites a top choice for our guests in the area. The 300-room Embassy Suites offers homey comforts for those on business and vacation alike-suites with separate living and sleeping areas, refrigerators, microwaves, coffeemakers, Wi-Fi access and two TVs. Wake up to a free cooked-to-order breakfast and enjoy the indoor pool and fitness center. A two-hour evening reception offers drinks and appetizers and the on-site restaurant serves American favorites. The property also has a business center with copy and fax services. Parking is available for an additional fee. Less than two miles from 1-405, the Embassy Suites is within a half-mile of various restaurants and just three miles from John Wayne Airport. Our guests say the Embassy Suites' location, “brilliant” breakfast and “friendly” staff make it one of their favorite Santa Ana properties.

Guest Ratings

Good                                                        Feb 8, 2017

By: Harold

Pros: Loved the breakfast and the friendly, helpful staff. Spacious accommodations made this a very good value.

Cons: Didn't love the heating/AC system; room was too cold for comfort. Also was not aware of the parking fee until we checked in. The parking fee was $ 17 a night.

Good                                                        Jan 24, 2017

By: Micaela

Pros: Breakfast was amazing with a variety of choices and the staff were helpful.

Cons: The room had a very strange old smell when we first got there. I had to open the door to air it out.

Very Good                                                    Jan 5, 2017

By: Bruce

Pros: The location was very good for us and the included breakfast was a plus.

CODS: The room was not cleaned properly when we got there. The heating system was not working for the hotel as well.

同类题4

阅读下面文字,完成第下列各题。

从田湖出发去找李白

阎连科

      ①出走和背叛,是少年时代楔进我脑里永远也拔不出来的一根桩。

      ②成长是由无数、无数次想要出走,而又不得不留下的过程叠加起来的;而成熟,是人生历练的静默不言的一种光。然而一次一次地想要离家和出走,想要把自己放逐到哪儿,也许正是长大、成熟的一种准备呢。在那偌大的田湖村,父母交给我们的爱,多得常常从小院漫出来。然而这种爱,还总是不能化去一个男孩想要离家出走的念想和理愿。有一天,我决定出走了。

      ③想到我决定要出走,有一种兴奋在我身上鼓荡着,仿佛不立刻离开那个家、那院子,我会窒息在那家那院的温暖里。也就说走就走,把作业课本收起扔在窗台上;把屋门、大门锁起来;把家里钥匙塞进家人可以找到的门脑上方的一个小墙洞儿里,就这么匆匆离家上路了。

      ④我不知道我要去哪儿,又好像早就计划好了要去哪儿样,直到沿着大堤走离村庄,东山渐近,田湖渐远,一片柳林外的伊河,白花花地泻在我面前,我才知道我要离家去哪儿——我要独自蹚过伊河水,爬到对面伏牛山的九皋主峰上。

      ⑤老师说过,九皋是伏牛山余脉东延的主峰,海拔九百多米,中国第一本诗集《诗经》上的“鹤鸣九皋,声闻于天”,说的就是那山和那峰。说唐朝的李白,曾独自从龙门走来,上过那山峰。还在那儿留过一首名为《鹤鸣九皋》的诗:

      ⑥昭化呈仙质,长鸣在九皋。……

      ⑦这首诗,有啥儿意味和蕴藏,那时我是完全不懂的(现在也不懂),但却觉得不懂反而好写了,如“窗前明月光”那样的《静夜思》,因为人人都懂反而写不得。

      ⑧我总以为自己能写出那种人人都不懂的诗,也就蓄意要爬到那山上,和李白一样坐在山顶,诗兴大发,写出一首好到别人都看不懂的诗。当然呢,写不写诗不重要,重要的是我终于离家出走、独自走了很远的路,经过了很多事,遇上了很多的艰辛和奇遇,它们都被我一一征服后,我成了站在山顶上的一个大人物。

      ⑨浪漫和草率,在我幼稚的胸膛发酵鼓胀着,使我有了一种从未有过的离家出走的英雄气。走小路,过村庄;在村头遇到了土狗追着我跑叫和撕咬;遇到了哪村的一匹惊马从我身边飞过去,弹起的灰尘落在我脸上,我都没有丝毫的恐惧和惊异。我是要离家出走的人。我要和李白一模样,独自登上那很少有人爬到山顶的九皋峰(一定要写诗),我当然不能有任何的惊惧和担忧。我就那么独自沿着东山下的村庄走,不和人说话,不和人来往,旁若无顾,视若无人,就到了九皋山下那条“牛瞪眼”的小路上。

      ⑩山在头顶,我在山下,正南的太阳烧在我的发梢上。我知道我不久就要登上九皋山,爬上主峰振臂高呼了。我要站在峰顶上,让风吹着我的头发和衣服,环顾四周,略思片刻,最后把我的胳膊高高举起挥动着,用我最大的嗓子对着天下唤:“有一天我要吃得好也要穿得好!”

      ⑪“有一天我要吃得好也要穿得好!为了不在写诗和爬山的路上碰到三姑家里人,我走过了两个村庄后,到了第三个我三姑家住的梁疙瘩村(这村名,烦),就有意绕过村庄,从村旁一片庄稼地里穿过去,沿着沟崖小道,攀着荆棵野榆走了很远的路,到了终于可以看清山顶时,以为峰顶到来了,诗也可能到来时,我可以站下回望,首先振臂高呼口号那一刻时,却从不远处的山崖边,蠕蠕动动爬上来一个人,收拾捆绑他在崖头砍拾的柴火(又是柴火),我们彼此一望,都怔着惊着了。他竟是我要躲要闪的三姑夫。三姑夫就那么如在那专门等我一样出现了。我呆在崖头边儿上,三姑夫看着极吃惊的我,很快平静下来连问了我三句话:“你怎么在这儿?”“是你三姑让你来这儿找我的?”“走,我们回家吃饭去。午饭都错过时辰了。”我就这样莫名其妙、前功尽弃地被我姑夫强拉硬拽着回他家里了。匆匆吃了饭,赶着日落和黄昏,就带着我下山和过河,又把我送回田湖了。

      ⑫盛大、庄重的离家出走,就这么草草地收兵结了尾。一场人生庄严的梦愿与宣誓,还未及最后登上宣誓台,就被人从梦中叫醒了。现实总是比梦想和理愿有力量,少年明亮美妙的梦,被现实一碰即破后,我这一生,再也没有机会登上那座山,再也没有可能在那山顶李白待过的地方坐坐与站站,高举着胳膊大唤了。

      ⑬我的少年就这样了,还是那时候的李白好。

      ⑭可我连李白的影子都没找到,就那样在历史与现实的错口和李白分手了。

(文章节选自《从田湖出发去找李白》,较原文有删改)