I'll lend you the bike, but you can only _____ it for two days.[ ]

A. borrow  

B. lend  

C. keep  

D. take

金银花抗病原微生物作用的有效成分( )

A．苦参碱
B．绿原酸
C．栀子苷
D．葵酰乙醛
E．靛蓝