肺动脉血氧含量高于右心室见于
A．房间隔缺损B．室间隔缺损C．动脉导管未闭D．法洛四联症E．病毒性心肌炎
参考答案：C
Tomorrow is Tom’s birthday. Have you got any idea _____the party is to be held?
A．what
B．which
C．that
D．where
水灰比和强度之间有什么关系？
