He spends about two hours soccer every day. [ ]
A. play
B. playing
C. to play
D. played
答案:B
—What’s her ______?
—She is a teacher. She has a lot of _____ to do.
A.work; work
B.job; job
C.work ; job
D.job; work
关于器官移植的排斥反应,错误的是
A.ABO血型配合及淋巴毒细胞毒试验能有效地预防超急性排斥反应
B.急性排斥反应是临床器官移植排斥反应中最常见的类型
C.慢性排斥反应是抑制物功能丧失的常见原因
D.合理应用免疫抑制剂能有效治疗排斥反应