下列哪项属于既往史（）
A.社会经历
B.职业
C.工作环境
D.外伤手术史
E.烟酒嗜好
参考答案：D
与药共制能缓和药物的燥性，增强疗效，除去药物不良气味，使药物气味均匀一致的是（）。
A.麦麸
B.河砂
C.稻米
D.土
E.蛤粉
The reason__________ she gives for not coming to the party is that her mother is ill. [ ]
A. what
B. why
C. as
D. that
