从基金性质上来看，契约型基金的资金是通过发行基金收益凭证筹集起来的（ ）。
A．信托资产
B．债务资产
C．法人资产
D．借贷资产
参考答案：A
以下一般能在血液中检测到的是（）
A.HBsAg
B.HBeAg
C.HBcAg
D.HBcAb
E.HBsAb
On his way to the airport,it________him all of a sudden that he had forgotten his passport.[ ]
A．hit
B．knocked
C．occurred
D．beat
