WHO推荐检测精子密度和活动率的方法为()A.计算机辅助精子分析 B.普通光学显微镜

题型:单项选择题

问题:

WHO推荐检测精子密度和活动率的方法为()

A.计算机辅助精子分析

B.普通光学显微镜直接目测法

C.精子运动轨迹图像分析法

D.精子分析仪法

E.相差显微镜检测法

考点:临床医学检验五、其它体验检测五、其它体验检测题库
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在基因突变中由于碱基替换可造成什么遗传效应或后果。(6分)

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某建筑边坡自然地面坡角为20°,地表无荷载,现采用梯形截面挡墙,(如图6.2.4.1所示)挡墙高度为6.0m,边坡为黏性土,内聚力c=10kPa.内摩擦角ψ=20°,重度为20kN/m3,墙背与填土间摩擦角为8°,墙背与水平面夹角为80°,假定墙背填土破裂时为直线型式,按《建筑边坡工程技术规范》GB50330—2002计算,主动土压力合力的标准值为()。

A、150kN

B、170kN

C、190kN

D、210kN

题型:单项选择题

锅炉的湿法停炉保养,一般适用于停炉期限不超过()

A、1周

B、1个月

C、半年

D、1年

题型:单项选择题

Happiness can be described as a positive mood and a pleasant state of mind. According to recent investigations, sixty to seventy percent of Americans consider themselves to be moderately happy, one in twenty persons feel very happy. Psychologists have been studying the factors contributing to happiness. It is not predictable nor is a person in an apparently ideal situation necessarily happy. The ideal situation may have little to do with his actual feelings.

A good education and income are usually considered necessary for happiness. Though both may contribute, they are only chief factors if the person is seriously under - educated or actually suffering from lack of physical needs. The rich are not likely to be happier than the middle-in-come group or even those with very low incomes. People with college education are somewhat happier than those who didn’t graduated from high schools, and it is believed that this is mainly because they have more opportunity to control their lives. Yet people with a very high income and a college education may be less happy than those with the same income and no college education.

It should be noted that people quickly get used to what they have, they are happiest when they feel they are increasing their level, no matter where it stands at a given time. The best formula for happiness is to be able to develop the ability to tolerate frustration, to have a personal involvement and commitment, and to develop selfconfidence and to selfesteem.

Which of the following statements is NOT true ?()

A. People in ideal situations are not necessarily happy.

B. Sometimes the poor may feel happier than the rich.

C. The richer one is, the happier one may be.

D. Those who are satisfied with what they have often feel happy.

题型:单项选择题

英语MEASURE指()

A、仪表

B、测量

C、按钮

D、信号

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