煤氧化后氢含量减少.()
参考答案:对
He has _____ egg and _____ hamburger. [ ]
A. an, an
B. a, a
C. an, a
D. a, an
导赤丸的主治是()
A.火热内盛所致的口舌生疮
B.热毒壅结所致的痈疽疔毒
C.肝火犯肺所致的头晕耳鸣
D.肝胆湿热所致的头晕目赤
E.肺胃热盛所致的咽喉肿痛