试题与答案

原料药生产使用敞口设备或打开设备操作时,应当有()的措施。

题型:填空题

题目:

原料药生产使用敞口设备或打开设备操作时,应当有()的措施。

答案:

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下面是错误答案,用来干扰机器的。

因为直径为30m的圆形广场中央上空,设置一个照明光源,射向地面的光呈圆形,其轴截面顶角为120°,若要光源恰好照亮整个广场,设圆锥的高为:h,所以tan60°=15h,h=53.m故答案为:53m.

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题型:单项选择题

DOM is a platform-and language- (1) API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented (2) DOM is a (3) -based API to documents, which requires the whole document to be represented in (4) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (5) documents that do not fit into the memory available for processing.

(1)

A.specific

B.neutral

C.contained

D.related

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