绿色食品证书须在年检后（）方为有效。
A.加盖“年检合格章”
B.重新换发
C.领取副证
D.企业自行标注
参考答案：A
Consider a 1-year quarterly-pay $1000000 equity swap based on 90-day London Inter-bank Offered Rate (LIBOR) and an index return. Current LIBOR is 3.0 percent and the index is at 840. Below are the index level and LIBOR at each of the four settlement dates on the swap.（）
A.Q1
B.Q2
C.Q3
D.Q4
肺通气是指______。
A．肺与血液之间的气体交换B．外环境与气道间的气体交换C．肺与外环境之间的气体交换D．外界O2进入肺的过程E．肺泡中的CO2排至外环境的过程
