下列哪一种不属于精神活性物质:()
A.咖啡
B.葡萄酒
C.地西泮
D.氯丙嗪
E.氯胺酮
参考答案:D
What are you going to do this Saturday ?
----- I ______ yet .
A.haven’t decided
B.won’t decide
C.am not decided
D.didn’t decide
试述关节结核的X线表现。