动脉导管结扎术易并发（）
A.Ⅲ度房室传导阻滞
B.肺动脉瓣返流
C.喉返神经损伤
D.膈神经损伤
E.三尖瓣返流
参考答案：C
—What should I wear to attend his wedding party?
—Dress ____ you like.
A．what
B．however
C．whatever
D．how
人体内的吞噬细胞包含（）
A、中性粒细胞
B、红细胞
C、造血干细胞
D、B-淋巴细胞
