心脏壁最厚的是() A.左心室 B.右心室 C.左心房 D.右心房

题型:选择题

问题:

心脏壁最厚的是(   )

A.左心室

B.右心室

C.左心房

D.右心房

考点:心脏的结构和功能
题型:选择题

从A、B、C、D四个选项中,选出与所给句子画线部分意思相同或相近的一项。

What he said moves me a lot. [ ]

A. What did he said

B. The thing

C. His words

D. He spoke

题型:选择题

社区矫正是促使符合社区矫正条件的罪犯顺利回归社会的()活动。

A.管制性

B.非监禁刑罚执行

C.监禁刑罚执行

D.强制性

题型:选择题

下面是某药品的一则广告宣传(节选),请阅读这则广告后,用你所学的遗传学知识,分析并指出其中的错误。

广告:“……人类男性的精子有两种,一种是XX,一种是XY。XX精子与卵子受精就生女孩,XY精子与卵子受精就生男孩。服用×××××后,可以提高XY精子的活性,提高XY精子的受精机会而生男孩,经过1893人使用后跟踪统计,有效率在98%以上……”

分析:

这则广告是错误的因为人类男性有两种精子,当卵细胞与含       性染色体的精子受精就生女孩,与含     性染色体的精子受精就生男孩,由此可见,生男生女取决于男性的       类型。从理论上讲生男生女的机会是均等,约各占        %,通过服药来提高男孩的出生率是不可信的。

题型:选择题

某公司的注册资本为人民币5000万元,法定盈余公积金累计为1250万元,该公司可以不再提取法定盈余公积金。 ( )

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.

The author’s purpose is to

A.give the basic facts of marriage in North America

B.explain the reasons why the divorce rate is high in North America

C.introduce why both husband and wife have to work outside their home

D.give a picture of family structural change in North America

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