商标纸折叠成型装置积胶或积垢，商标纸包装成型过程中会产生商标纸折叠不良，烟包（）等质

下列化学用语的表述正确的是

A．离子结构示意图：可以表示¹⁶O^2－，也可以表示¹⁸O^2－

B．比例模型：可以表示甲烷分子，也可以表示四氯化碳分子

C．氯化铵的电子式为：

D．CO₂的结构式为：

读反映人口数量与环境关系的三种模式图，完成小题。

小题1:下列对“环境人口容量”的理解错误的是(　　)

A．环境人口容量是指生态系统对人口的承载能力

B．消费水平的高低对环境人口容量有较大的影响

C．人类可以局部地改造环境，从而可使人口数量超越环境容量

D．生态环境的平衡是人类生存的前提和人类改造自然的基础小题2:按照人口数量与环境关系的理想程度由好到差排列，三种模式的顺序依次为(　　)

A．Ⅰ、Ⅱ、Ⅲ

B．Ⅱ、Ⅰ、Ⅲ

C．Ⅲ、Ⅱ、Ⅰ

D．Ⅰ、Ⅲ、Ⅱ

第2篇 Youth Emancipation in Spain

The Spanish Government is so worried about the number of young adults still living with their parents that it has decided to help them leave the nest.
Around 55 percent of people aged 18--34 in Spain still sleep in their parents’ homes, says the latest report from the country’s state-run Institute of Youth.
To coax (劝诱) young people from their homes, the institute started a "Youth Emancipation (解放)" programme this month. The programme offers guidance in finding rooms and jobs.
Economists blame young people’s family dependence on the precarious (不稳定的) labour market and increasing housing prices. Housing prices have risen 17 percent a year since 2000.
Cultural reasons also contribute to the problem, say sociologists. Family ties in south Europe -- Italy, Portugal and Greece -- are per than those in middle and north Europe, said Spanish sociologist Almudena Moreno Minguez in her report "The Late Emancipation of Spanish Youth: Keys for Understanding".
"In general, young people in Spain firmly believe in the family as the main body around which their private life is organized," said Minguez.
In Spain -- especially in the countryside, it is not uncommon to find entire groups of aunts, uncles, cousins, nieces and nephews (外甥/侄子) all living on the same street. They regularly get together for Sunday dinner.
Parents’ tolerance (宽容) is another factor. Spanish parents accept late-night partying and are wary of setting bedtime rules.
"A child can arrive home at whatever time he wants. If parents complain he’ll put up a big fight and call the father a Fascist," said Jose Antonio Gomez Yanez, a sociologist at Carlos Ⅲ University in Madrid.
Mothers’ willingness to do children’s household chores worsens the problem. Dioni-sio Masso, a 60-year-old in Madrid, has three children in their 20s. The eldest, 28, has a girlfriend and a job. But life with mum is good.
"His mum does the wash and cooks for him; in the end, he lives well," Masso said.

Young people’s family dependence can be attributed to all the following factors EXCEPT ______.

A．parent’s tolerance

B．housing problems

C．cultural traditions

D．unwillingness to get married

与其他风险事故发生概率的波动性相比，人寿保险中被保险人的死亡率的特性是（）。

A.绝对稳定性

B.相对稳定性

C.绝对波动性

D.相对波动性

卵细胞作为生殖细胞，在生物技术中一般用于（）

A.植物组织培养形成试管苗

B.花药离体培养得到单倍体植株

C.克隆动物时细胞核的受体

D.形成受精卵培育转基因动物