第一心音分裂见于（）
A.心肌炎
B.心包炎
C.肾炎和肺炎
D.肝炎
E.脑炎
参考答案：A
吊篮若用钢筋链杆，其直径不小于16mm，每节链杆长为（）
A.300mm
B.500mm
C.800mm
D.1000mm
.A woman tearfully explained _____she had recently lost her husband in a car accident.
A．when
B．how
C．why
D．where
