一般情况下，临床首选的骨髓穿刺部位为（）
A.髂骨后上棘
B.胸骨
C.棘突
D.胫骨
E.椎骨
参考答案：A
—Did you hear any strange _______ when the quake happened?
—No, I was in my garden with my flowers and was enjoying the
beautiful _______ of my birds at that time. [ ]
A. voice; noise
B. noise; sound
C. whisper; sound
D. sound; voice
用短路法做变压器的温升试验适应于（）变压器
A.油浸式
B.干式
C.所有
D.风冷
