治疗特发性肺纤维化首选药物是
A．环磷酰胺
B．复方丹参
C．抗生素
D．糖皮质激素
E．β2(下标)受体激动药
参考答案：D
—The weather isn't good enough for an outing，is it?
—Not at all. We can't have ________ at this time of the year.
A．a worse day
B．a nicer day
C．such bad a day
D．so fine a day
膳食纤维的生理功能是____。
A、促进肠道蠕动
B、低血胆固醇
C、改善糖代谢
D、减少摄入热量
