问题
选择题
After all the students had taken their seats, the teacher _______the examination paper.
A．handedin
B．handedon
C．handedout
D．handedover
答案
答案：C
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After all the students had taken their seats, the teacher _______the examination paper.
A．handedin
B．handedon
C．handedout
D．handedover
答案：C
）医学上又叫升白宁，对肿瘤患者化疗和放疗所致的白细胞减少症有较好的疗效。根据题意完成下列填空：