肺源性心脏病，心影有时可呈（）
A.梨形心
B.横位心
C.悬垂型心
D.靴形心
E.主动脉型心
参考答案：C
翻译句子。
1. They abandoned the stolen car.
2. He had to abandon the job because of illness.
3. He abandoned himself to despair.
4. The people were so excited that they jumped and shouted with abandon.
外交使团的作用是从事（）方面的活动。
A.礼仪
B.谈判
C.建交
D.调停
