除能养阴外,均能清心的药物是()
A.沙参、百合
B.百合、麦冬
C.麦冬、天冬
D.天冬、石斛
E.石斛、玉竹
参考答案:B
放射免疫分析质量控制的指标,反应误差关系(RER)应为()。
A.<0.002
B.<0.02
C.<0.04
D.<0.08
E.<0.2
It is much _____ today than yesterday. I need to put on my coat. [ ]
A. cold
B. warm
C. colder
D. warmer