吩噻嗪类药物氯丙嗪具有多种多样的药分性质是由于
A.具有两性
B.具有硫氮杂蒽结构及含氮侧链结构
C.易生成配合物
D.易氧化还原
E.光谱特征参数丰富
参考答案:B
---How did the warm-hearted lady find you and return your lost bag?
---She said that she my bag on the bench with my name card in it.
A.notice
B.was noticing
C.has noticed
D.had noticed
试说明:(a2+3a)(a2+3a+2)+1是一个完全平方式.