题目

The stranger shook me by the hand warmly ___ he were to say he knew me well. A . even if B . when C . if D . as if 答案：D用四舍五入法按要求对0.05019分别取近似值，其中错误的是 [     ]A、0.1（精确到0.1）B、0.05（精确到百分位） C、0.05（保留两个有效数字）D、0.0502（精确到0.0001）