一份合同从合同准备到合同终结,经办人操作的环节包括()。
A.合同准备
B.合同订立
C.合同三性审查
D.合同签署备案
E.合同终结
参考答案:A, B, D, E
After he became conscious, he remembered and on the head with a rod.
A.to attack;hit
B.to be attacked;to be hit
C.attacking;be hit
D.having been attacked;hit
在△ABC中,AB=AC,BD是AC边上的高,且∠ABD=50°,则顶角∠BAC的度数为______.