鸦胆子的用法用量是()
A.3~10g,先煎
B.3~10g,煎服
C.0.5~2g,吞服
D.1~15粒,后下
E.10~30粒,吞服
参考答案:C
I have learned English _____ two years. [ ]
A. for
B. in
C. since
D. during
简述古代希腊世界的地理范围和特点。