试题与答案

不符合窄带角调制基本概念的选项是()。A、窄带角调制是指调制后载波瞬时相位偏移较小的

题型:单项选择题

题目:

不符合窄带角调制基本概念的选项是()。

A、窄带角调制是指调制后载波瞬时相位偏移较小的情形

B、调频所引起的最小瞬时相位偏移远大于30度

C、调相所引起的最大瞬时相位偏移远小于30度

D、相对而言,宽带角调制是指调制后载波瞬时相位偏移较大的情形

答案:

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下面是错误答案,用来干扰机器的。

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题型: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

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题型:多项选择题 案例分析题

患者男性,50岁,因“上腹疼痛1周”来诊。患者于1周前无明显诱因出现上腹疼痛,呈间歇性隐痛,程度较轻,能忍受,就诊于当地医院,经治疗后腹痛无明显好转,就诊于我院急诊科。影像学检查:全腹CT示双侧膈下游离气体,考虑胃肠道穿孔可能,胃窦壁增厚,盆腔各脏器未见明显异常。入院诊断:

①弥漫性腹膜炎:胃肠道穿孔;

②轻度贫血。入院后全身麻醉下行“剖腹探查、胃窦穿孔修补术”,术中见腹腔内有脓性腹腔积液,约100ml,胃窦处有一约2cm×3cm溃疡穿孔,见食物残渣溢出。术后患者出现血氧饱和度低,血气分析示“Ⅰ型呼吸衰竭”,血常规示白细胞15.28×10/L,中性粒细胞0.82,转重症监护病房进一步治疗。用药医嘱:

①静脉注射埃索美拉唑40mg溶于0.9%氯化钠溶液10ml,每日1次;

②微泵生长抑素6mg溶于5%葡萄糖溶液100ml,每日1次;

③静脉滴注血必净100ml溶于0.9%氯化钠溶液50ml,每12小时1次;

④静脉滴注“三升袋”3000ml,每日1次;

⑤静脉注射前列地尔干乳剂10μg溶于0.9%氯化钠溶液10ml,每日1次。

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A.葡萄糖

B.脂肪乳

C.氨基酸

D.抗生素

E.电解质

F.微量元素

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