淤血时血液主要淤积在（ ）
A．小动脉和毛细血管内
B．小动脉和小静脉内
C．大动脉和小动脉内
D．动脉和心腔内
E．毛细血管和小静脉内
参考答案：E
一次函数f(x)是减函数，且满足f[f(x)]＝4x－1，则f(x)＝__________.
The time of waiting for payment agreed upon by both sides is the period of （）.
A. shipment
B. draft
C. hill of lading
D. credit
