HLA抗原抗体反应引起（）
A.非溶血性发热反应引起
B.超敏反应
C.溶血反应
D.输血后紫癜
E.感染
参考答案：A
Tom went off to the EXPO Garden with his friends, _____ an exciting day of discovering the unique (
独特的) culture of each nation.
A．expected
B．expecting
C．to expect
D．expects
900千克□9吨，□里应填[ ]
A．>
B．<
C．=
