属于阴中之阴的时间是（）
A.上午
B.中午
C.下午
D.前半夜
E.后半夜
参考答案：D
理论电位—pH图的局限性？
Directions:
You have trouble with reading and are in need of some advice from Professor Wang.
Write a letter to him to
1) give him your personal information,
2) state your problems, and
3) ask for an interview with him.
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.
