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问题 单项选择题

高压旋喷注浆作业时，供浆、送气应连续，一旦中断，应将注浆管下沉至停供点（）以下，待恢复供应后再旋转提升。

A、300mm

B、250mm

C、200mm

D、100mm

答案

参考答案：C

多项选择题

有关鼻咽纤维血管瘤的叙述中，错误的是：（）

A．取活检观察有无恶性变

B．可出现脑神经麻痹症状

C．好发于男性青春期

D．以单侧鼻塞、鼻出血为特征

E．与咽扁桃体肥大鉴别有困难
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单项选择题 共用题干题

System analysis is traditionally done top-down using structured analysis based on (1). Object-oriented analysis focuses on creation ofmodels. The three types of the analysis model are (2). There are two substages of object-oriented analysis. (3) focuses on real-world things whose semantics the application captures. The object constructed in the requirement analysis shows the (4) of the real-world system and organizes it into workable pieces. (5) addresses the computer aspects of the application that are visible to users. The objects are those which can be expected to vary from time to time quite rapidly.

空白（1）处应选择（）

A.functional decomposition

B.object abstraction

C.data inheritance

D.information generalization
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