搜题请搜索小程序“爱下问搜题”
问题 单项选择题

葡萄糖中糊精检查的基本原理是( )。

A．药物与杂质氧化还原性质的差异
B．杂质与一定试剂反应产生沉淀
C．药物与杂质溶解行为的差异
D．药物与杂质对红外光吸收性质的差异
E．药物与杂质对紫外光吸收性质的差异

答案

参考答案：C

问答题

阅读下面一首诗，然后回答问题。

画眉鸟

欧阳修

百啭千声随意移，山花红紫树高低。

始知锁向金笼听，不及林间自在啼。

本诗表现手法上最突出的特点是什么？从诗中能领悟到诗人怎样的思想感情？

____________________________________________________________________

查看答案
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.

" ’ Stranger-oriented’ socialization system" in Paragraph 5 probably means ______.

A．strangers come home to take care of children

B．neighbors don’t know each other

C．mothers work outside their home and become strange to their children

D．children become strange to their parents
查看答案