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问题 单项选择题

使用木工机械圆盘锯加工木模时，上锯人员的手距锯齿不得小于（），下锯人员应待木料推出工作台或锯片20cm后方可接料。

A、20cm

B、30cm

C、40cm

D、50cm

答案

参考答案：B

单项选择题

颅底陷入症可有下列症状，但不包括()

A．共济失调

B．肌张力障碍

C．吞咽反呛

D．颅内压增高症状

E．癫痫
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单项选择题

The software architecture of a program or computing system is the structure or structures of the system, which comprise software （1）, the externally （2） properties of those components, and the relationships between them. The architecture is not the operational software. Rather, it is a （3）that enables a software engineer to: analyze the （4） of the design in meeting its stated requirements, consider architectural alternatives at a stage when making design changes is still relatively easy, and reduce the （5） associated with the construction of the software.

3（）

A.framework

B.deliverables

C.representation

D.semanticmodels
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