题目

即使危险，我们也要尽力帮助他。________ ________ it's dangerous, we'll try to help him. 答案：【答案】Even though/if 【解析】even though=even if即使，引导让步状语从句，位于句首，开头字母大写，故填Even；though/if。平面上不重合的两点的对称轴是__________________________,角的对称轴是这个角的______________________________