问题 选择题
函数y=
2-x
2x2-5x-3
的定义域为(  )
A.(-∞,2]B.(-∞,-
1
2
]
C.(-∞,-
1
2
)∪(-
1
2
,2]
D.(-
1
2
,2]∪[3,+∞)
答案

2-x≥0
2x2-5x-3≠0
,解得x≤2且x≠-
1
2

所以原函数的定义域为(-∞,-

1
2
)∪(-
1
2
,2].

故选C.

阅读理解与欣赏

阅读《对自己的人生负责》,完成后面问题。(17分)

对自己的人生负责 (周国平)

①人活在世上,不免要承担各种责任,小至对家庭、亲戚、朋友,对自己的职务,大至对国家和社会。这些责任多半是应该承担的。不过,我们不要忘记,除此之外,我们还有一项根本的责任,便是对自己的人生负责。

②每个人在世上都只有活一次的机会,没有任何人能够代替他重新活一次。如果这唯一的一次人生虚度了,也没有任何人能够真正安慰他。认识到这一点,我们对自己的人生怎么能不产生强烈的责任心呢?在某种意义上,人世间各种其他的责任都是可以分担或转让的,唯有对自己的人生的责任,每个人都只能完全由自己来承担,一丝一毫都依靠不了别人。

③不止于此,我还要说,对自己的人生的责任心是其余一切责任心的根源。一个人唯有对自己的人生负责,建立了真正属于自己的人生目标和生活信念,他才可能由之出发,自觉地选择和承担起对他人和社会的责任。正如歌德所说:“责任就是对自己要求去做的事情有一种爱。”因为这种爱,所以尽责本身就成了生命意义的一种实现,就能从中获得心灵的满足。相反,我不能想象,一个不爱人生的人怎么会爱他人和爱事业,一个在人生中随波逐流的人怎么会坚定地负起生活中的责任。实际情况往往是,这样的人把尽责不是看作从外面加给他的负担而勉强承受,便是看作纯粹的付出而索求回报。  

④一个不知对自己的人生负有什么责任的人,他甚至无法弄清他在世界上的责任是什么。有一位小姐向托尔斯泰请教,为了尽到对人类的责任,她应该做些什么。托尔斯泰听了非常反感,由此想到:人们为之受苦的巨大灾难就在于没有自己的信念,却偏要做出按照某种信念生活的样子。当然,这样的信念只能是空洞的。这是一种情况。更常见的情况是,许多人对待责任确实是完全被动的,他们之所以把一些做法视为自己的责任,不是出于自觉的选择,而是由于习惯、时尚、舆论等原因。譬如说,有的人把偶然却又长期从事的某一职业当做了自己的责任,从不尝试去拥有真正适合自己本性的事业。有的人看见别人发财和挥霍,便觉得自己也有责任拼命挣钱花钱。有的人十分看重别人尤其上司对自己的评价,谨小慎微地为这种评价而活着。由于他们不曾认真地想过自己的人生使命究竟是什么,在责任问题上也就必然是盲目的了。

⑤所以,我们活在世上,必须知道自己究竟想要什么。一个人认清了他在这世界上要做的事情,并且在认真地做着这些事情,他就会获得一种内在的平静和充实。他知道自己的责任之所在,因而关于责任的种种虚假观念都不能使他动摇了。我还相信,A如果一个人能对自己的人生负责,那么,在包括婚姻和家庭在内的一切社会关系上,他对自己的行为都会有一种负责的态度。B如果一个社会是由这样对自己的人生负责的成员组成的,这个社会就必定是高质量的、有效率的社会。   

(选自《中华活页文选》初三卷,2014.3)

小题1:本文的中心论点是什么?文章是从哪些方面论述中心论点的?(4分)

小题2:第②段加框处的“这一点”指代的具体内容是什么?(4分)

小题3:文章结尾处A、B两句话能否调换位置?为什么?(5分)

小题4:通读全文,你认为怎样做才能对自己的人生负责?请用简洁的语言概括。(4分)

阅读理解

Another day begins with the call of the phone’s alarm, Where are you? Open your eyes. Turn the alarm off and you will start working out on your apps(应用软件).

First stop, weather: Sunny day. Look outside the window. Oh, no, it isn’t. Second stop, Air Quality Index: 344, dangerous, Level 6 Severely Polluted. Mental recheck required: It really is a sunny day and the weather app isn’t lying or in need of being replaced, it’s just that you can’t see the sun through the thick fog. Note to self: Cycling to work is out, face mask is in.

Has the world stopped turning? News app merely confirms that it’s business as usual. Another government has fallen, your soccer team has lost again, and China’s economy is still increasing steadily.

Diary app informs you of all the things you failed to do the previous day and loads you up with another half-dozen tasks. Next, browse a couple of social networking apps to determine the status updates of friends.

Another sound from the phone, it’s a message from your significant friend who is already at work, saying the Taobao. com order for Italian cheese is about to arrive.

Apps have become part of our “every-moment” lives. Apps provide so much information. But the dark side to all this connectivity would be lack of privacy, being a slave to the app. The only real problem is that once you lose your smartphone, you lose your life.

Some friends and family do not have smartphones, but prefer the old-fashioned Nokia that merely makes phone calls and sends instant messages. While I respect their purity and desire to be free of the control of technology, it’s obvious they are outsiders, and their lives are loaded up with paper and old devices. They’re still buying books at stores, complaining the lack of CDs on the market, watching TV and missing out on complete news cycles. Though I would add, they have lives that aren’t spent inside small screens.

My phone is a palm-sized one-stop shop and about the only thing it doesn’t do is teleport(心灵运输). What’s not to like?

小题1:The functions of apps mentioned in the passage can be listed as follows EXCEPT that _______.

A.the apps can show you weather forecast

B.the apps can tell you how to work directly

C.the apps can inform you the latest news

D.the apps can tell you what you failed to do小题2: According to the passage, the author thinks that _______.

A.people’s life is governed by apps

B.people feel bored about the use of apps

C.people can’t live without apps

D.people hate apps with powerful functions小题3:It can be inferred from the last paragraph but one that _______.

A.more and more people like Nokia more than apps

B.using Nokia can be free of the control of technology

C.all people don’t like the advanced smartphones

D.ordinary people don’t like shopping online