大黄素属于（）
A．萘醌
B．菲醌
C．蒽醌
D．蒽酮
E．二蒽酮
参考答案：C
Could it be in the restaurant in ____ you had dinner with me yesterday ____you left behind your keys and wallet?
A．which；which
B．which；that
C．that；where
D．where；where
A．I= ，从上向下
B．I= ，从上向下
C．I= ，从下向上
D．I= ，从下向上
