Linda asked her mother __   _ at 7 o'clock.[ ]

A.to wake up her  

B.to wake her up  

C.wakes her up  

D.wakes up her

a．乳浊液b．胶体溶液c．真溶液d．混悬液,这四种分散系统，按其分散度的大小，由大至小的顺序是()

A．a>b>c>d

B．c>b>a>d

C．d>a>b>a

D．c>b>d>a

E．b>d>a>c