搜题请搜索小程序“爱下问搜题”
问题 单项选择题

在统计指数体系中，总变动指数（对象指数）等于各因素指数的（）。

A.乘积

B.相除之商

C.总和

D.相减之差

答案

参考答案：A

解析：因素分析选择指标的要求是：研究对象指标必须等于各影响因素指标的连乘积。因素指标可以是两个，也可以是多个。

填空题



Americans have four primary avenues for making friends: at work, at school, through a hobby or a (1) such as volunteer work and discussion group, or through a family or (2) .
In American culture, a job is more than the work that one performs between the hours of 9 a.m. and (3) . Work becomes a major socializing influence. Many young mothers who (4) their jobs to care for small children remark on the loneliness of their new lifestyles because they have lost their forum for (5) .
A great number of American employers recognize business social (6) and use it to build a family atmosphere on the job so that employees will feel (7) in their work environment. Some employers arrange company get-togethers in their home or at a (8) . American companies have at least one (9) annually, usually at Christmas time. Many corporations have (10) where employees and administrators alike dress (11) to play games such as baseball and volleyball.
Top American administrators often hold social gatherings (12) . Depending upon the size of the employer’s home and the number of (13) . These social gatherings may be picnics, pool parties, or (14) . If the company is large, an employer may hold what Americans call (15) . For an open house, the employer will invite his employees to come to his home (16) between 1 p.m. on a certain day. Those invited usually stay for (17) , chatting with the other guests and their host. People come and go (18) during the designated hours, and the host keeps refreshments, usually (19) or hors d’oeuvres and beverages, available for all who come. For such social gatherings, it is considered (20) the invitation unless you have an excellent reason.
查看答案
单项选择题

一足月儿，娩出时需面罩加压吸氧，峰压3．92kPa（40cmH2O），共3min。进入婴儿室时观察到小儿呼吸急促伴呻吟及青紫，心尖搏动右移，胸廓不对称。最可能的诊断是（）

A.湿肺

B.先天性心脏病

C.纵隔气肿

D.气胸

E.气管食管瘘
查看答案