阅读下面的文字，完成小题。

雪域青稞

次旦多吉

①久在江南读书，一日独坐阳台，竟忽而想起家乡的青稞地来。那苍茫的图景，连带着一些许心绪，竟一股脑儿地填满胸壑，不能得解。

②也许你会觉得奇怪，青藏高原上的青稞地，不就和北方的麦子地是一模一样的吗？不就是如此平淡吗？看上去不如南国的稻田秀丽，不如西北的胡杨壮观，我只能这样告诉你，那是因为你还没有登上过巍峨的青藏高原，在如此恶劣的环境看它们是如何坚强地生长。

③在我老家的东面，就有一块不大的土地，每到播种季节，母亲都会找人把青稞播种到地里。这块土地的土质很差，而且已经让先前的作物生长了一季，营养早已被上季的作物用光，再种青稞不是白白地浪费种子吗？有时，我会禁不住向母亲提出这样的问题，不过母亲每次都是微微一笑。说：“青稞可不像你想的那样，只管种下去，不论怎么着，到了明年也能收，这样咱们就可以做青稞饼，也可以做青稞酒了!”原来如此!就像母亲对我说的，青稞真像她小时候一样，养孩子和养牲口一样，只要有能吃的东西，哪怕是糟糠窝窝头，只要有能穿的衣服，哪怕是几片破布头，他们一样可以长大成人。现在想起来，可不是吗，青稞不就是庄稼中的牲口吗!

④于是，渐渐地喜欢上了青稞，这种低调却又顽强的草本植物。闲暇时候，我仿佛是受到了某种诅咒似的，总是会在不经意的漫步中，走进齐腿深的青稞田之中。那些青稞刀切似的整齐，看上去异常壮观，偶尔地会有几株从整齐的队伍中冒将出来，饱满的果穗倔强地想要触摸天空。也许是因为贪婪生长，所以它们才会这么突出，而我更愿意将它们看成是田中的佼佼者。

⑤严冬过后，正是青稞返青、继续生长的时候，然而这个时候却是高原多风的季节。强劲的北风一旦吹起，就连杨树那些看似坚不可摧的植物都要断条手臂下来，可是青稞呢，它们凭借根须，紧紧地抓住脚下的土壤，在猎猎北风中集体舞蹈!我似乎正在慢慢参透这其中的玄机，飞翔并不单单那么一种，鸟儿张开翅膀，翱翔于蓝天白云之上的，叫做飞翔；然而像青稞这样，乘着劲风，在地面上恣肆舞蹈的，也是一种飞翔。只有一个完全的自由者，才会拥有这种飞翔。怪不得，会有那么多诗人热衷于描写青稞，这其貌不扬的青稞，真倒像极了海明威笔下的圣地亚哥，活脱脱的一个硬汉，活脱脱的一个精神象征。

⑥犹能记起初见稻子时的情景。因为读书的缘故，那是我第一次离开家，离开生活了二十年的西藏。火车一路驶向江南的土地，当我还沉浸在长江的壮观时，一抹重重的绿色映着敞开的车窗扑进来。我心想，这就是稻苗吧。它们整整齐齐地拥簇在一起，绿得发亮，绿得耀眼。如果说家乡的青稞地是一尊富有内涵的雕像，那么初见江南的稻田，真觉得它们像极了由色彩取胜的泼墨画。雕像凝重，饱含着思想的力量，而泼墨画则精致，细腻，让人想起“草长莺飞二月天”，让人想起那争抢暖树的几只早莺。

⑦如今，久在南国，我已切身感受到江南文化的典雅和细腻，然而不论它是多么迷人，即便是每天都在看那一片片的稻田，我却总也忘却不掉西藏的青裸。虽然没有那么精致、典雅，却也别有一番率性而为的美。

⑧某一个暑假，我专程赶回老家，想去看看久违的青稞。这个时期青稞和油菜花一样长得茂盛而碧绿。回到家后，母亲先为我打点好餐饭，我心里就一直默默念叨：我已经有一年的时间没有吃上青稞。我一口气吃了四个热乎乎的青稞饼。紧接着就独自一人跑向青稞田。当我爬上一座山头，一边啃着母亲做的青稞饼，一边放眼辽阔的青稞田时，我的情绪变得有些难以控制，仿似一下子扑进了母亲的怀里。

⑨到这里，我觉得，我真是一个孝顺的孩子。不但孝顺生我养我教诲我的母亲，而且更加孝顺生我母亲养我母亲教诲我母亲的青藏高原。

阅读理解

    Last year I ruined my summer vacation by bringing along a modern convenience that was too convenient for my own good: the iPad. Instead of looking at nature, I checked my email. Instead of paddling a small boat, I followed my Twitter feed (推特简讯). Instead of reading great novels, I stuck to reading four newspapers each morning. I was behaving as if I were still in the office. My body was on vacation but my head wasn't.

    So this year I made up my mind to try something different: withdrawal (退出) from the Internet. I knew it wouldn't be easy, since I'm bad at self-control. But I was determined. I started by giving the iPad to my wife.

    The cellphone signal at our house was worse than in the past, making my attempts at cheating an experience in frustration (沮丧). I was trapped, forced to go through with my plan. Largely cut off from e-mail, Twitter and my favorite newspaper websites, I had few ways to connect to the world except for radio and how much radio can one listen to, really? I had to do what I had planned to all along: read books.

    This experience has had a happy ending. With determination and the strong support of my wife, I won in my vacation struggle against the Internet, realizing finally that it was I, not the iPad, that was the problem.I knew I had won when we passed a Starbucks and my wife asked if I wanted to stop to use the Wi-Fi. “ I don't need it,” I said.  

    However, as we return to post -vacation life, a harder test begins: Can I continue when I'm back at work? There are times when the need to know what's being said right now is great. And I have no intention of giving up my convenience completely. But I hope to resist the temptation (诱惑) to check my e-mail every five minutes, which leads to checking my Twitter feed and a website or two.

    I think a vacation is supposed to help you reset your brain to become more productive. Here I hope this one worked.

一首歌中唱到“种下一颗种子，长出了果实”说明生物（  ）

用显微镜观察下列细胞，能够看到叶绿素的是（　　）

书籍好比一架梯子，它能引导我们登上知识的殿堂。