下列有关家鸽适于飞行生活特点的说法中,错误的是[ ] A.身体呈梭形,可减少飞行

题型:选择题

问题:

下列有关家鸽适于飞行生活特点的说法中,错误的是[ ]

A.身体呈梭形,可减少飞行时的阻力

B.有可以进行呼吸的气囊

C.消化、吸收、排出粪便都很迅速

D.胸骨有龙骨突,长骨中空

考点:动物的形态结构和功能
题型:选择题

某抗生素对多数革兰阳性细菌和阴性球菌、放线菌及螺旋体等均有抗菌作用,且不耐酸、不耐酶,对厌氧菌和铜绿假单胞菌无效,该药是

A.红霉素

B.羧苄西林

C.苯唑西林

D.氨苄西林

E.青霉素G

题型:选择题

阅读理解。

永恒的母亲

  (1)我的母亲——猎进兰女士,在19岁高中毕业那年,经过相亲,认识了我的父亲。母亲20岁的时候,她放弃进入大学的机会,下嫁父亲,成为一个妇人。

  (2)童年时代,很少看见母亲有过什么表情,她的脸色一向安详,在那安详的背后,总使人感受到那一份巨大的茫然。

  (3)等我上了大学的时候,对于母亲的存在以及价值,才知道再做一次评价。记得放学回家来,看见总是在厨房里的母亲,突然脱口问道:“妈妈,你念过尼采没有?”母亲说没有。又问:“那叔本华、康德和萨特呢?还有……这些哲人难道你都不晓得?”母亲还是说不晓得。我呆望着她转身而去的身影,一时感慨不已,觉得母亲居然是这么一个没有学问的人。我有些发怒,向她喊:“那你去读呀!”这句喊叫,被母亲丢向油锅内的炒菜声挡掉了,我到房间去读书,却听见母亲在叫:“吃饭了!今天都是你喜欢的菜。”

  (4)以前,母亲除了东南亚之外,没有去过其他的国家。八年前,当父亲和母亲排除万难,飞去欧洲探望外孙和我时,是我的不孝,给了母亲一场心碎的旅行。外孙的意外死亡,使得父亲、母亲一夜之间白了头发。更有讽刺意味的是,母女分别了十三年后重逢的那个中秋节,我们却正在埋葬一个亲爱的家人。这万万不是存心伤害父母的行为,却使我今生今世一想起那父母亲的头发,就要泪湿满襟。

  (5)母亲的腿上,好似绑着一条无形的带子,那一条带子的长度,只够她在厨房和家中走来走去。大门虽没有上锁,她心里的爱,却使她甘心情愿把自己锁了一辈子。

  (6)我一直怀疑,母亲总认为她爱父亲的深度胜于父亲爱她的程度。

  (7)还是九年前吧,小兄的终身大事终于在一场喜宴里完成了。那一天,当全场安静下来的时候,父亲开始致词。父亲要说什么话,母亲事先并不知道,他娓娓动听地说了一番话。最后,他话锋一转道:“我同时要深深感谢我的妻子,如果不是她,我不能得到这四个诚诚恳恳、正正当当的孩子,如果不是她,我不能拥有一个美满的家庭……”当父亲说到这里时,母亲的眼泪夺眶而出,她站在众人面前,任凭泪水奔流。我相信,母亲一生的辛劳和付出,终于在父亲对她的肯定里,得到了全部的回收。

  (8)这几天,每当我匆匆忙忙由外面赶回家去吃晚餐时,总是呆望着母亲那拿了一辈子锅铲的手发呆。就是这双手,把我们这个家管了起来。就是那条腰围,没有缺过我们一顿饭菜。就是这个看上去年华渐逝的妇人,将她的一生一世,毫无怨言,更不求任何回报地交给了父亲和我们这些孩子。

  (9)回想到一生对于母亲的愧疚和爱,回想到当年读大学时看不起母亲不懂哲学书籍的罪过,我恨不能就此跪在她的面前,向她请求宽恕。今生唯一的孝顺,好似只有在努力加餐这件事上来讨得母亲的快乐。

  (10)想对母亲说:真正了解人生的人,是她;真正走过那么长路的人,是她;真正经历过那么多沧桑的,也全然用行为解释了爱的人,也是她。在人生的旅途上,母亲所赋予生命的深度和广度,没有一本哲学书籍能够比她更周全。

  (11)母亲啊母亲,在女儿的心里,你是源,是爱,是永恒。

  (12)你也是我们终生追寻的道路、真理和生命。

1.父母的欧洲之行为什么是“一场心碎的旅行”?

_____________________________________________________

2.第(7)段中母亲听到父亲在喜宴上的致词,为什么会“泪水奔流”?

_____________________________________________________

3.“我”上大学时是怎样评价母亲的?后来“我”对母亲的情感发生了变化,变化的原因是什么?

_____________________________________________________

4.读了全文后,你对题目“永恒的母亲”中“永恒”一词是如何理解的?

_____________________________________________________

5.第(5)段中,母亲为了她心里的爱,甘心情愿地把自己锁了一辈子。你赞成母亲的这种做法吗?请谈谈你的看法和理由。

_____________________________________________________

题型:选择题

什么叫投影图?

题型:选择题

At the beginning of the twentieth century, North American society held, as an ideal, the Nuclear Family. This presumably perfect residential, social, and economic unit consisted of an adult male, an adult female and their minor children. This structure was thought to be stable and long lasting.
However, a few decades later, the structure of that ideal family was being altered radically even while it was being touted as the structure to be aimed for. Popular magazines bemoaned the loss of the Nuclear Family and its replacement with inferior forms.
There are a number of factors that are acting in concert to apply pressure on the Nuclear Family and generate a variety of new structures. Some of these are:
The definition of marriage has changed somewhat in that few people now consider it to last "until death do us part". The concept of monogamy (the marriage of one man and one woman) has been modified to a form now referred to as serial monogamy (the marriage of one man and one woman at a time). This reflects the increasing equality of women and men in terms of economic advantage and the recognition that many women no longer depend on men for their survival. Women are acquiring independence and have become empowered to make their own choices. With this independence, the need to form a relationship with a man becomes less important. This change embodies the concept that the marriage is temporary and can be terminated by either partner at any time. Associated with this, of course, is the relaxation of the divorce laws and the significant reduction of the shame that had one time been attached to divorce.
The economy of North America has resulted in a two-tier system of a few rich who control most of the resources and a large portion of the population who control almost none of the resources. Because of this, many couples are forced to have both partners with full-time jobs outside the home. There are unintended byproducts of the need for a double income. The most important of these is the replacement of a mother-oriented socialization of children to a "stranger-oriented" socialization system reflected in the growth of the childcare industry. Also, either partner is financially able to end the marriage without significant hardship.
The combination of these changes will in the coming decades have a profound effect on the structure of the family of North America. As a result, the family will be a fluid, constantly changing structure with variable household arrangements as the norm.

In Paragraph 5, "two-tier system" means some ______.

A.men have many wives while others have none

B.people are very rich while others are very poor

C.people have too much work to do while others have nothing to do

D.people control others

题型:选择题

质量为m的物体,沿倾角为θ的光滑斜面由静止起下滑,当它下降h高度时,重力的瞬时功率等于(  )

A.mg

2gh
sinθ

B.mg

2gh
cosθ

C.mg

2gh

D.mg

2ghsinθ

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