题目内容：
泡沫灭火系统的强度试验压力为公称压力的（ ）倍。
A．1．0 B．1．1
C．1．5
D．2．0
参考答案：
单选题：泡沫灭火系统的强度试验压力为公称压力的（ ）倍。
- 题目分类：消防安全技术综合能力
- 题目类型：单选题
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B．1．1
C．1．5
D．2．0
B．1．1
C．1．5
D．2．0
雨淋报警阀组调试时，雨淋报警阀在联动信号发出或者手动控制操作后（ ）内启动。
雨淋报警阀组调试时，雨淋报警阀在联动信号发出或者手动控制操作后（ ）内启动。A．15s B．30s C．60s D．90s
构图的基本要素有形状、线条、明暗、色彩等。在做以线造型的素描构图练习中，运用的主要是形状和（ ）两要素。
构图的基本要素有形状、线条、明暗、色彩等。在做以线造型的素描构图练习中，运用的主要是形状和（ ）两要素。 A．线条 B．明暗 C．色彩 D．构成
Let us take care of the house while you are away, __________
Let us take care of the house while you are away, __________ ?A．shan't we B．shal
It was in the small house __________ was built with stones _
It was in the small house __________ was built with stones __________ he spent h
She looks forward every spring to __________ the flower-line
She looks forward every spring to __________ the flower-lined garden．A．walking i