出生后即有明显紫绀的先天性心脏病是
A.法鲁四联症
B.永存动脉干
C.完全性大血管转位
D.肺动脉闭锁
E.室间隔缺损
参考答案:A,B,C,D
下图中,表示非晶体熔化时温度随时间变化的图象是[ ]
A.
B.
C.
D.
I tried phoning her office, but I couldn't ____. [ ]
A. get along
B. get on
C. get to
D. get through