后勤工作会议主题报告及部局（总队）领导讲话要在会前拟定初稿，期限是（）。
A、10天
B、15天
C、20天
D、25天
参考答案：B
婴幼儿胸部正位摄影，焦-片距一般为 （）
A.45cm
B.60cm
C.100cm
D.150cm
E.200cm
They said that they had made up their minds to ______ the task in spite of the extremely difficult conditions.
A．carry off B．carry on C．carry out D．carry forward
