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【单选题】
根据《火灾自动报警系统设计规范》GB50116-2013的规定，消防控制室内的设备面的距离不应小于（ ）m。A.
3
B.
1.5
C.
2
D.
2.5
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举一反三
【单选题】It can be inferred from the first paragraph that
A.
oil was first discovered and used in the Middle East.
B.
the oil age is short-lived and has already come to its end.
C.
the shortage of kerosene led to the use of petrol and diesel.
D.
the oil age is largely attributed to technological developments.
【单选题】( )是用香勺盛取香粉填入香拓。填香就是添香，添世间之美好入胸中，吸天地之灵气于心间，使自己常怀美好情感，感恩美好生活。
A.
梳理香灰
B.
香押压灰
C.
香拂扫灰
D.
填香入宫
【单选题】____ can be used to prevent hydraulic system overloaded or keep the pressure of oil outlet from pump constant
A.
Overflow valve
B.
Reducing valve
C.
Balancing valve
D.
Reducing valve or balancing valve
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