以下关于丹红注射液的描述正确的是()
A.八项措施安全可靠
B.循证医学研究证据
C.可用于治疗骨科疾病
D.组方复杂
参考答案:A, B, C
Try ________ she might, Sue couldn't get the door open. [ ]
A. if
B. when
C. since
D. as