人体工程学研究的内容。

在用友报表软件中，编制单位、日期一般不能作为文字内容输入，而是需要设置为关键字。（）

在一个固定容积的密闭容器中充入2molNO₂，一定温度下建立如下平衡：2NO₂

N₂O₄，此时平衡混合气中NO₂的体积分数为x%，若再充入1mol N₂O₄，在温度不变的情况下，达到新的平衡时，测得NO₂的体积分数为y%，则x和y的大小关系正确的是（　　）

A．x＞y

B．x＜y

C．x=y

D．不能确定

Anna, Oleg, Peter, Rosa and Viktoria are partners working together in a general partnership. The business has been operating profitably for two years. However, there have been arguments between the partners about the amount of work each contributes to the business.At an informal meeting attended by Anna, Oleg, Rosa and Viktoria, it was suggested that Peter had been putting much less effort into the business than the other partners. Anna suggested that steps be taken to dismiss Peter from the partnership. Oleg and Rosa agreed with this proposal, but Viktoria was opposed to this, arguing that Peter contributed valuable ideas to the business. They agreed to discuss the matter in the near future.A few days after the meeting, Anna died in an accident. Anna’s daughter Svetlana, her legal heir, subsequently made it clear that she wished to take over Anna’s position in the partnership. None of the surviving partners wished to work with Svetlana, who had no relevant business experience.Required:

(b) Explain whether the partners can prevent Svetlana from becoming a partner. (5 marks)

对爆炸性气体危险场所敷设电缆的要求，叙述正确的一项是( )。

A．易燃气体比空气重时，电缆应架空敷设

B．电缆不得沿输送易燃气体的管道敷设

C．电缆及其管、沟穿过不同区域之间的墙、板空洞处，应填土保护

D．如果电缆长度不够时，中间可以有接头