描述数据分布集中趋势的指标有() A.算术平均数 B.调和平均数 C.众数 D.中位

题型:多项选择题

问题:

描述数据分布集中趋势的指标有()

A.算术平均数

B.调和平均数

C.众数

D.中位数

考点:统计学原理统计学原理题库
题型:多项选择题

发作性呼气性呼吸困难,临床最常见的原因是下列哪一项()。

A.慢性呼吸衰竭

B.肺炎球菌肺炎

C.支气管哮喘

D.喘息性支气管炎

E.支气管异物

题型:多项选择题


In the following passage, there are 25 blanks representing words that are missing from the context. You are to put back in each of the blanks the missing word. Write your answers on the ANSWER SHEET. The time for this section is 25 minutes.
Of all the employed workers in the United States, 12.5 million are part of a temporary workforce. The United States Bureau of Labor Statistics counts 9.2 percent of workers as those who have (1) they term "alternative employment arrangements." The government predicts that temporary staffing agencies (2) experience growth of 49 percent by 2010. If numbers increase at the rate (3) , these companies will add 1.9 million new jobs by 2010. That’s more than any (4) industry.
Temporary workers were the first ones to be affected by the recent economic recession, but they are (5) to be the first to regain positions as the economy picks up and companies work to rebuild. Employers use temporary workers as a resource because (6) offer
flexibility and come at a low cost. Many temporaries are categorized as "independent contractors" instead of employees, (7) allows the employer to avoid (8) certain taxes. Because they are not required to offer benefits to temporary workers, companies can save a great deal of money by hiring temps. Usually, temporary workers can qualify (9) benefits if they work for a staffing company for a certain length of time. Most temps, however, do not continue with one company long (10) to qualify for them because they regard the position as a step on the ladder to a (11) position later.
According to Richard Wahlquist, president of the American Staffing Association, 75 (12) of temporary workers hope for transition out of the temporary staffing category (13) a period of time. Wahlquist finds that temporary workers spend about 11 weeks on various assignments before their (14) out of the temporary workforce. Many use temporary positions to gain experience and skills (15) they move on to better jobs. Wahquist says that the temp workforce as a whole turns (16) 400 percent each year.
Tom Dilworth, research director at the Employment Policies Institute, explains (17) some workers like having temporary jobs (18) it affords them a great deal of elasticity with time and everything. Some temps only have a limited (19) of time to work and temp agencies can help coordinate jobs to fit their schedules. Other sometimes-employees use temporary jobs to get an (20) to a company from the inside, to get a foot in the door of a certain business or career. (21) others take temporary positions in hopes their employers will change them over to permanent positions eventually.
Nearly all the industries in the United States use temporary workers. (22) to Tim Costello, coordinator of the North American Alliance for Fair Employment, the growth of temporary labor threatens (23) job security of permanent workers who fear replacement,as well as the temps who are more accustomed to turnover. He predicts that there will continueto (24) a gradual shift from permanent employees to contingent staffing, and that such a (25) in workplace demographics will "lead to lower wages, poorer working conditions, and more instability."

题型:多项选择题

三十九岁男性,反复发作口腔溃疡20余年,多见于口角,下唇内侧,颊部,舌缘,每次发生1个或数个不等,近2年来发作较频繁,溃疡较大,疼痛较重,愈合时间长。查体;右侧颊部可见一直径2cm的溃疡,边缘整齐,底部微凹,基底稍硬,周边红肿,周围有数个直径2~3mm的小溃疡呈卫星状分布。舌缘,口角区有瘢痕形成

根据患者的临床表现,最可能的诊断是()

A.轻型阿弗他溃疡

B.重型阿弗他溃疡

C.褥疮性溃疡

D.癌性溃疡

E.结核性溃疡

题型:多项选择题

规定军队医院和医务人员在战争中对伤病员保持中立地位的文献是()

A.《赫尔辛基宣言》

B.《医德十二箴》

C.《希波克拉底誓言》

D.《日内瓦宣言》

E.《纽伦堡法典》

题型:多项选择题

控制器操作中,当秤台上无正常加载物,但仪表上有显示值时按()键使仪表回到毛重零。

A、清零

B、去皮

C、清除

D、秤台切换

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