--I can’t solve the math problem because it is too difficult. What should I do?

-- _________ ask the teacher for help?

A．How about

B．What about

C．Why don’t you

D．Why not you

单纯性肾病在病理生理上与肾炎性肾病的不同点是( )

A．基底膜上有IgG沉着
B．仅有肾小球基底膜通透性增高
C．肾小球破坏
D．肾小球内有非特异性炎症
E．肾小球内有凝血现象