题干

下列现象或事实,用分子的相关知识加以解释,其中不正确的是(   )

 现象或事实

 解释

A

 热胀冷缩

 分子大小随温度改变而改变

B

 酒香不怕巷子深

 分子不断地运动

 C

 氧气可供人呼吸,一氧化碳有毒

 构成物质的分子不同,性质也不同

 D

 水通电后生成氢气和氧气

在化学变化中分子种类会改变

A:A  

B:B  

C:C  

D:D

上一题 下一题 0.0难度 选择题 更新时间:2016-10-11 05:01:55

答案(点此获取答案解析)

A

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    In many countries, it is important to have many children In the US, a few religious groups emphasize the importance of large families, but most people think one or two children are enough, and many couples have no children. ____ Having many children would restrict the freedom and individualism of the parents as well as the other children in the family.

    Parents teach individualism by the way they raise their children ____ Parents begin teaching this self-reliance early, asking the child to do things on her own and praising her when she does.

    ____ They bring their children with them to church, to sporting events, to stores, and to social events. However, many places, such as expensive restaurants and live theatre productions, do not welcome children. Most formal social gatherings those with written invitations do not welcome children either.

    Children,especially boys are expected to be energetic and assertive(果敢的).

    ____ Parents are expected to keep their children under control at all times, particularly in public places and in the homes of others. When a child misbehaves only the child's patents may discipline him. ____ Most patents discipline their children by rewarding good behaviors, not by punishing bad behaviors. while a spanking,a slap to the child's buttocks(屁股), is acceptable to some people, any punishment that wounds the child or leaves a mark is considered child abuse and is against the law.

A. The relationship between American parents and their children is harmony

B. That doesn't mean, though, that they are allowed to “run wild” in public.

C. Because taking care of a child is very costly, financially, emotionally, and socially, many couples view large families as a disadvantage.

D. Others adults should not interfere (干涉) unless the child is doing something which may be harmful to himself

E. American children are expected to accept invitations to a formal party.

F. Many parents want to expose their children to a variety of situations.

G. They want to create a self-reliant, independent child, who can make it on her own by age eighteen.