下列属于苯丙胺类兴奋剂的是（）
A.芬太尼
B.冰毒
C.氯胺酮
D.镇痛新
E.海洛因
参考答案：B
Only then ________ that he had lost a good chance of achieving his dream.
A．he realized
B．realized he
C．did he realize
D．will he realize
黄瓜发芽最适宜的温度是（）。
A.15-20℃
B.25-30℃
C.33-35℃
D.40-42℃
