门静脉收集的血液范围不包括（）
A．肝
B．胃
C．脾
D．空肠
E．胆囊
参考答案：A
()年成立了“国际金钥匙协会”，我国在90年代初被接纳为成员国。
A.1950
B.1951
C.1952
D.1953
Not until I began to work _____ how much time I had wasted. [ ]
A. didn't realize
B. did I realize
C. I didn't realize
D. I realized
