问题
选择题
30. Jennifer, who is my best friend, said she would go abroad for further education __________.
A．before long
B．long before
C．shortly after
D．very fast
答案
A
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30. Jennifer, who is my best friend, said she would go abroad for further education __________.
A．before long
B．long before
C．shortly after
D．very fast
A
以下每道试题有2～6个提问，每个提问有5个备选答案，请选择1个最佳答案。
| 患者，男，6岁，于进食时出现呛咳，随即出现胸闷、进行性呼吸困难。查体：口唇发绀，可闻及喉鸣、三凹征阳性。 |
该患者诊断的主要依据是
A．发绀
B．三凹征阳性
C．年龄
D．呼吸困难的程度
E．胸闷