西汉的建立者是 [ ]
A、汉高祖
B、汉文帝
C、汉武帝
D、光武帝
答案：A
--- Beautiful day, isn’t it? Shall we go out for a picnic?
--- ______________!
A．Sounds great
B．Good luck
C．You are right
D．Have fun
围绝经期为减少因雌激素水平降低所致的骨质疏松，每天应补充钙多少克（）
A.0.5g
B.1g
C.1.5g
D.2.0g
E.1.8g
