问题 单项选择题 配伍题

对麦角胺咖啡因无效的偏头痛可用()。

A.非甾体药物(吲哚美辛)

B.发作早期给麦角胺咖啡因

C.5.羟色胺受体激动剂

D.普萘洛尔、苯噻啶等药物

E.皮质类固醇

答案

参考答案:C

单项选择题

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 the middle of the twentieth century, people in North America______.

A.were tired of the Nuclear Family

B.wanted to give up the Nuclear Family

C.believed that the Nuclear Family was hopeful

D.were indifferent to the Nuclear Family

填空题

金属材料是工农业生产和人们生活离不开的材料之一,人类每年要从自然界获取大量的金属材料资源。

探究铁、铜、银三种金属活动性强弱。下面为某同学的实验方案,我们一起对实验分析、完善并归纳。

[实验药品]铁片、铜片、银片、20%稀硫酸、CuSO4溶液、AgNO3溶液、FeSO4溶液

[提出假设]三种金属的活动性强弱为:Fe>Cu>Ag

[实验方案]取体积相等的金属片,用砂纸打磨光亮;分别进行下列实验操作。

[观察分析]

(1)上述实验中能观察到金属表面有气泡产生的是()(填字母A、B、C)。

(2)我国古代“湿法炼铜”就是利用了实验试管D中的反应原理,该反应属于()反应(填:基本反应类型)。

[方案完善]通过上述实验还不能证明铁、铜、银三种金属的活动性强弱,请你在此基础上补充一个实验达到实验目的。

实验操作步骤 实验现象 结论()

[讨论归纳]

根据上述实验探究过程,请你归纳探究金属活动性强弱的方法一般有:()。

[拓展运用]

(1)向一定量的铁粉中逐滴加入稀硫酸至过量,图是反应过程中某种物质的质量Y随加入稀硫酸的质量变化的关系,则y不可能表示()。

A.消耗铁粉的质量

B.生成硫酸亚铁的质量

C.溶液的总质量

D.生成氢气的质量

(2)铜的化学性质比铁稳定,但铜在一定条件下也会生锈。某化学兴趣小组用A~D装置探究铜生锈的条件(A、B、D中均为煮沸过的蒸馏水,B中试管上层充满CO2,C中放有干燥剂,向D中通入空气,一段时间后将试管密封)。

十天后发现,只有A中铜生锈,且水面处铜生锈较严重。铜生锈的条件是()。

(3)实验室废液中含有硝酸银、硝酸铜,实验小组利用稀硫酸和铁粉分别回收银和铜,设计如下方案。先在废液中加入过量的铁粉,充分反应后过滤得到滤渣A。再对滤渣A按如下流程图处理:

a.先在废液中加入过量的铁粉。

b.含有硫酸亚铁的滤液有()(填框图中字母)。

c.如果在过滤操作中发现滤液浑浊,在仪器洁净、滤纸未破损的前提下,你认为滤液的浑浊的原因可能是()。

根据上述实验探究过程,请你归纳探究金属活动性强弱的方法一般有:()。