上肢远端关键点是()。
A.肩峰
B.拇指
C.趾
D.髂前上棘
E.胸骨中下段
参考答案:B
As a general rule, revenue is normally recognized when()
A. it is measurable.
B. it is measurable and received.
C. the earnings process is complete and cash receipt is assured.
根据AQ1029—2007标准要求,低瓦斯和高瓦斯矿井采煤工作面采用串联通风时,被串工作面的进风巷设置()。
A、甲烷传感器T4
B、甲烷传感器T3
C、甲烷传感器T2
D、甲烷传感器T1