最适合固定化细胞的方法是( )。 A.包埋法 B.化学结合法 C.物理吸附法

题型:单项选择题

问题:

最适合固定化细胞的方法是( )。

A.包埋法
B.化学结合法
C.物理吸附法
D.交联法

考点:教师招聘考试中学教师招聘笔试教师公开招聘考试中学生物
题型:单项选择题

一项工程,甲队单独做需30天完成,乙队单独做需40天完成.甲队单独做若干天后,由乙队接着做,共用35天完成了任务.甲、乙两队各做了多少天?

题型:单项选择题

资料7中谈到了不愿“涉农”的现象,请结合社会现实,对此现象进行评析并提出化解思路。
要求:评论全面,表述准确,观点合理;对策合理、可行,有针对性。不超过400字。

题型:单项选择题

根据短文内容,从下框的A~F选项中选出能概括每一段主题的最佳选项,选项中有一项为多余项.

A.   Study the levels of stress by comparison.

B.Higher level of stress causes more trouble.

C.Milder stress does more harm than expected.

D.A certain level of stress is efficient in working conditions.

E.Always pay enough attention to mild stress.

F.Modern social conditions may lead to stress.

     1.________

     Even relatively mild stress can lead to long term disability and an inability to work, reveals a large

population based study published online in the Journal of Epidemiology (流行病学) and Community

Health.It is well known that mental health problems are associated with long term disability, but the impact

of milder forms of psychological stress is likely to have been underestimated (低估), say the authors.

     2.________

     Between 2002 and 2007, the authors tracked the health of more than 17,000 working adults up to the

age of 64, who had been randomly selected from the population in the Stockholm area. All participants

completed a validated (经验证的) questionnaire at the start of the Study to measure their mental health

and stress levels, as well as other aspects of health and wellbeing.

     3.________

     During the monitoring period, 649 people started receiving disability benefit -203 for a mental health

problem and the  remainder for physical ill  health. Higher levels of  stress at the start of the study were

associated with a significantly greater likelihood of subsequently being awarded long term disability benefits.But even those with mild stress were up to 70% more likely to receive disability benefits, after taking

account of other factors likely to influence the results, such as lifestyle and alcohol intake.One in four of

these benefits awarded for a physical illness, such as high blood pressure, angina(心绞痛), and stroke(中风), and almost two thirds awarded for a mental illness, were likely to have been caused by stress.

     4.________

     The authors say that it is important to consider their findings in the context of modern working life, which places greater demands on employees, and social factors, such as fewer close personal relationships and supportive networks.

     5.________

     These factors lead them to ask: "Are the strains and demands of modern society commonly exceeding (超出) human ability?" And they conclude that while mild stress should not be overmedicalised, their findings suggest that it should be taken more seriously than it is.

题型:单项选择题

《孟子·告子》载:“天子适诸侯,曰巡狩;巡所狩也;诸侯朝天子,曰述职;述职者,述所职也。无所事者……~不朝则贬其爵.再不朝则削其地,三不朝则六甲师移之。”此材料反映的历史现象是()

A.周初的分封制

B.周王室对诸侯失控

C.春秋时诸侯争霸

D.齐桓公称霸

题型:单项选择题

按需代维费用是指完成按需代维工作内容所产生的费用,乙方需另外投入()和()完成按需代维工作。

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