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问题 单项选择题 A1/A2型题

叶酸缺乏症患者的白细胞计数一般为（）

A.明显下降

B.明显增高

C.增高或正常

D.正常或偏低

E.轻微增高

答案

参考答案：D

解析：叶酸缺乏可导致巨幼细胞性贫血，血象中，白细胞和血小板轻度减小。

单项选择题

For users, microkernel technology promises (90) , compact and sophisticated operating systems that are typically (91) across a range of hardware platforms. These operating systems will be customizable to let users run multiple operating system and application "personalities" on top of a single microkernel (92) .

Microkernel based systems can provide this flexibility because the core operating system functions are (93) from the large number of utilities, features and extensions that are layered on top of them. As a result, updating and maintaining operating system is easier, since developers don’t have to modify the (94) every time they must acid a new feature.

（94）是（）

A.core

B.center

C.heart

D.utility
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单项选择题

根据Bailey提出的高绩效工作系统的模型，高绩效工作系统的特点主要是（）

A、工人参与基层决策的机会

B、高绩效工作系统中对工人劳动力技能的要求

C、针对高绩效工作系统的激励机制

D、以上都是
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