利用坡度坑进行装卸时，坡度坑的坡度角应小于（）度，坑位必须选择坚实土质处

任前公示有哪些方式？

机动车在高速公路上正常行驶时，最低时速不得低于60km/h，小型客车最高时速不得高于（）。

A、120km/h

B、110km/h

C、100km/h

D、90km/h

采用排列图法进行工程质量控制统计分析，考虑a～f这6种影响因素，影响频数分别为： a为350，b为30，c为：100，d为70，e为400，f为50。下列说法正确的是( )。

A．a因素是次要因素

B．b因素是一般因素

C．c因素是次要因素

D．d因素是次要因素

E．e因素是主要因素

两块板道路通常是利用中央分隔带将车行道分成两部分。下列关于中央分隔带的设置和两块板道路的交通组织应该考虑的问题，描述正确的一项是( )。

A．解决对向机动车流的相互干扰问题，规范规定，当道路设计车速大于60km/h时，必须设置中央分隔带

B．有较高的景观和绿化要求，对于景观、绿化要求较高的生活性道路，可以使用较宽的绿化分隔带形成景观绿化环境

C．地形起伏变化较大的地段，有高差的中央分隔带，宽度可随地形变化而变化，以减少土方量和道路造价，增加道路美观

D．机动车与非机动车分离，机动车与自行车基本上不发生矛盾，不必设置较宽的绿化带来调配

We have known for a long time that the organization of any particular society is influenced by the definition of the sexes and the distinction drawn between them. But we have realized only recently that the identity of each sex is not so easy to pin down, and that definitions evolve in accordance with different types of culture known to us, that is, scientific discoveries and ideological revolutions. Our nature is not considered as immutable, either socially or biologically. As we approach the beginning of the 21st century, the substantial progress made in biology and genetics is radically challenging the roles, responsibilities and specific characteristics attributed to each sex, and yet, scarcely twenty years ago, these were thought to be "beyond dispute".

We can safely say, with a few minor exceptions, that the definition of the sexes and their respective functions remained unchanged in the West from the beginning of the 19tb century to the 1960s. The role distinction, raised in some cases to the status of uncompromising dualism on a ply hierarchical model, lasted throughout this period, appealing for its justification to nature, religion and customs alleged to have existed since the dawn of time. The woman bore children and took care of the home. The man set out tc conquer the world and was responsible for the survival of his family, by satisfying their needs in peacetime and going to war when necessary.

The entire world order rested on the divergence of the sexes. Any overlapping or confusion between the roles was seen as a threat to the time-honored order of things. It was felt to be against nature, a deviation from the norm.

Sex roles were determined according to the "place" appropriate to each. Women’s place was, first and foremost, in the home. The outside world, i.e. workshops, factories and business firms, belonged to men. This sex-based division of the world (private and public) gave rise to a strict dichotomy between the attitudes, which conferred on each its special identity. The woman, sequestered at home, "cared, nurtured and conserved". To do this, she had no need to be daring, ambitious, tough or competitive. The man, on the other hand, competing with his fellow men, was caught up every day in the struggle for survival, and hence developed those characteristics which were thought natural in a man.

Today, many women go out to work, and their reasons for doing so have changed considerably. Besides, the traditional financial incentives, we find ambition and personal fulfillment motivating those in the most favorable circumstances, and the wish to have a social life and to get out of their domestic isolation influencing others. Above all, for all women, work is invariably connected with the desire for independence.

From paragraph 1 we can infer that it is now possible for women to embark on a career because（）

A.the change in sex roles is out of the question

B. women’s lib has been going on for many years

C. ideas about the roles of women have been changing

D.the expansion of sciences scarcely remolds the women’s roles