甘草的解毒成分
A．甘草苷
B．甘草甜素
C．甘草利酮
D．异甘草苷
E．香豆素
参考答案：B
—_____ has your brother studied in New York?
—For two years. [ ]
A. How far
B. How old
C. How often
D. How long
正常双眼眼压差异（）
A.10～21mmHg
B.≤5mmHg
C.≤8mmHg
D.＞5mmHg
E.＞8mmHg
