心律完全不整，心音强弱不等，脉短绌的是（）
A.心房扑动
B.心房颤动
C.阵发性室性心动过速
D.阵发性室上性心动过速
E.窦性心动过速
参考答案：B
对说话时声母和韵母都有问题的幼儿，可以（）
A.先矫治韵母后矫治声母
B.同时矫治韵母和声母
C.先矫治声母后矫治韵母
D.检查发音器官是否受损
Directions: You will invite Professor Green to be the guest speaker at the NASHE 2007 annual conference (Beijing, China, 2007. 12.15-12.18). Write a letter of invitation to Professor Green.
You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. Do not write the address. (10 points)
