大庆石油会战，岗位工人交接班实行“三一”、“四到”、（）交接班法。
A.五报
B.六报
C.七报
D.八报
参考答案：A
下列激素反馈系统有正反馈的是（）
A.下丘脑-垂体-肾上腺轴
B.下丘脑-垂体-甲状腺轴
C.下丘脑-垂体-性腺轴
D.肾素-血管紧张素-醛固酮
E.甲状旁腺素-血钙
This is one of the best films that ___ this year. [ ]
A. is appearing
B. appear
C. has appeared
D. have appeared
