对咬合关系起关键作用，应尽量保留，避免拔除的牙是（） A.第一恒磨牙 B.第三恒磨牙

可比性是指同一企业不同时期发生的相同或相似的交易或者事项，应当采用一致的会计政策，不得随意变更。（）

信息安全风险评估的自评估和检查评估都可依托自身技术力量进行，也可委托具有相应资质的（）提供技术支持。

钢筋加工要求（）。

A、盘条钢筋在加工前进行拉伸处理

B、加工钢筋时应检查其质量，凡有劈裂、缺损等伤痕的残段不得使用

C、短段钢筋允许接长用作分布筋（构造钢筋），主筋严禁有接头

D、短段钢筋允许接长用作分布筋（构造钢筋），主筋允许有接头

Not everyone in the world requires the same amount of living space. The amount of space a person needs around him is a cultural difference, not an economic one. Knowing your own psychological space needs is important because they ply affect your choices, including, for example, the number of bedrooms in the home. If you were brought up in a two child family and both you and your sister or brother had your own bedrooms, the chances are if you have two children or more, that you also will offer separate bedrooms for them. In America, for example, they train people to want to have their own rooms by giving them their own rooms when they are babies. This is very unusual in the world. In many other countries, the baby sleeps in the same bed with his parents or in bed near them.
The space in the home also shows a lot about psychological space needs. Some families gather closer to each other and the size of their house has nothing to do with it. Others have separate little corners where family members go to be alone.
Although it is true that psychological space needs are not decided by economic reasons, they sometimes have to be changed a little because of economic pressure. It is almost impossible, however, to completely change your psychological space needs.

The best title for this passage is

A．American Way of Living
B．Psychological Space
C．Space Needs in Different Countries
D．Psychological Space and Economic Pressure

拉尔夫·达伦道夫在1998年写道：20世纪在相当大程度上为各种分裂所主宰，导致热战冷战不断，但20世纪同时也是一体化的起源；全球化开始主导人们的生活、想象和恐惧，人们不得不从全球的角度去思考，以回应这一日益全球化的现实。 达伦道夫在这里强调的是，20世纪( )。

A．全球剧变令人忧虑

B．国家之间对抗激烈

C．世界联系日益密切

D．民族矛盾逐渐缓和