—Jane and July are here. Did I introduce them to you?

—No，you didn’t. I’ve seen them，but we__________.

A．hadn’t been introduced

B．haven’t been introduced

C．weren’t introduced

D．didn’t introduce

下列不属于药物或制剂的物理配伍变化的是()

A．光照下氨基比林与安乃近混后后快速变色

B．乳剂与其他制剂混用时乳粒变粗

C．两种药物混合后产生吸湿现象

D．溶解度改变有药物析出

E．生成低共熔混合物产生液化