对猪、鸡及幼年反刍动物在考虑蛋白质需要量的同时，还应考虑蛋白质的品质，成年反刍动物可

Let's _____ a basketball match tonight. [ ]

A. see

B. read

C. watch

D. look

试题四

某政府部门A定制开发的业务信息化系统通过多年的使用，运行稳定，但是，由于业务的扩展，系统已经满足不了业务的需要，A在征集了各业务处室的改进建议之后，决定借鉴原系统的成功经验，重新开发一套新的业务信息化系统。

问题4：请简述软件测试的目的。

微量元素锌被称为生命的电火花是我国科学家宋应星发现，它来源于()

A.粮谷类

B.动物肝脏类

C.蔬菜类

D.海产品类

E.水果类

发展性试题。

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。

注意：每空格1个单词。

     Most people feel lonely sometimes, but it usually only lasts between a few minutes and a few hours. This

kind of loneliness is not serious. In fact, it is quite normal. For some people, though, loneliness can last for

years, Now researchers say there are three different types of loneliness.

     The first kind of loneliness is temporary. This is the most common type. It usually disappears quickly and

does not require any special attention, The second kind, situation-for example, family problem, the death of a

loved one, or moving to a new place. Although this kind of loneliness can cause physical problems. such as

headaches and sleeplessness, it usually does not last for more than a year.

     The third kind of loneliness is the most severe. Unlike the second type, chronic (the opposite of

"temporary") usually lasts more than two years and has no specific cause. People who experience habitual

loneliness have problems socializing and becoming close to others. Unfortunately, many chronically lonely

people think there is little or nothing they can do to improve their condition.

      Psychologists agree that one important factor in loneliness is a person's social contacts, for example,

friends, family members. co-workers, etc. we depend on various people for different reasons; For instance, our

families give us emotional support, our parents and teachers give us guidance, and our friends share similar

interests and activities. However, psychologists have found that, though lonely people may have many social

contacts, they sometimes feel they should have more, They question their popularity.

     Psychologists are trying to find ways to help habitually lonely people for two reasons: they are unhappy and

unable to socialize and there is a connection between chronic loneliness and serious illness as heart disease,

while temporary and situational loneliness can be a sad, and sometimes dangerous condition.

      Loneliness and Disease

NK细胞的生物学活性包括（ ）

A．分泌细胞因子，如IFN-γ、TNF-β干扰病毒复制

B．直接特异性杀伤肿瘤细胞

C．分泌穿孔素

D．ADCC杀伤

E．吞噬杀伤