It was _____ she took off her dark glasses _____ she was a famous film star. [ ]

A. when, that didn't realize

B. not until, that I realized

C. not when, when I realized

D. until, that I didn't realize

增溶作用源于表面活性剂的哪一个作用()

A．形成胶团

B．分子极性基团

C．分子亲油基团

D．多分子膜

E．形成氢键