--- Oh, it’s you! I ________ you.--- I’ve just had my hair cut and I am wearing new glasses.

题干

--- Oh, it’s you! I ________ you.
--- I’ve just had my hair cut and I am wearing new glasses.

A：didn’t recognize

B：hadn’t recognize

C：haven’t recognize

D：don’t recognize

上一题下一题 0.0难度选择题更新时间:2010-12-29 08:17:37

A

步骤	烧杯①	烧杯②
1	加入1 000毫升清水、一条健康的成年金鱼	加入1 000毫升清水,但不加入金鱼
2	在金鱼口前方滴入2-3滴BTB溶液，观察流出鳃盖后缘的水的颜色变化情况并记录	滴入2-3滴BTB溶液，观察水的颜色变化并记录
3	重复以上实验2次，分析得出结论