丙酮酸脱氢酶复合体中最终接受底物脱下的2H的辅助因子是
A．FAD
B．硫辛酸
C．辅酶A
D．NAD+
参考答案：D
先天性肥厚性幽门狭窄的声像图特点，需除外的是（）。
A.幽门管长径≥20mm
B.幽门横断直径≥15mm
C.幽门区呈靶环样肿块
D.幽门壁厚<4mm
E.幽门以上的胃腔内见潴留物
When she got to the little house, someone opened the door to let her in.
A．Right.
B．Wrong.
C．Doesn't say.
