进行小儿头皮静脉注射时，针头应沿静脉离心方向平行刺入。
参考答案：错
Only when he told me the news _____ what had happened. [ ]
A. I knew
B. I did nkow
C. knew I
D. did I know
营养素含量丰富，又有滋补作价值，故有“动物人参”美誉的禽鸟是？
