如图表示一天之内(早7:00-第二天早7:00)温室大棚中CO2含量的变化,在a

题型:选择题

问题:

如图表示一天之内(早7:00-第二天早7:00)温室大棚中CO2含量的变化,在a点打开通风口的目的是(  )

A.补充大棚CO2

B.补充大棚O2

C.降低大棚温度

D.降低大棚湿度

考点:呼吸作用
题型:选择题

一患者昨晚睡眠过程中突然尖叫一声,双眼上翻、双上肢屈曲,下肢伸直,呼之不应。伴咬舌,尿失禁,2~3分钟后抽搐停止。醒后觉头痛,全身疼痛()

A.抗胆碱酯酶药量不足,增加抗胆碱酯酶药物的剂量

B.抗胆碱酯酶药物过量,停用抗胆碱酯酶药物

C.抗胆碱酯酶药物不敏感,增加抗胆碱酯酶药物的剂量

D.抗胆碱酯酶药量不足,停用抗胆碱酯酶药物

E.抗胆碱酯酶药物不敏感,停用抗胆碱酯酶药物

题型:选择题

按照布卢姆等人的认知教育目标分类,代表最低水平的认知学习目标是( )

A.知识

B.领会

C.应用

D.评价

题型:选择题

高温油品不准带水,罐内有水要及时()。

A、分析

B、切除

C、倒罐

D、汇报

题型:选择题

化学与社会、环境密切相关,下列有关说法不正确的是

A.使用太阳能代替化石燃料,能减少温室气体的排放。

B.绚丽缤纷的烟花中添加了含钾、钠、钙、铜等金属元素的化合物

C.食用植物油的主要成分是高级脂肪酸甘油酯,是人体所需营养物质·

D.对“地沟油’’蒸馏可以获得汽油

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.

Many wives work outside their home because they ______.

A.want to be independent

B.don’t want to stay at home

C.don’t have to take care of their children

D.want to make money for their home

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