题目

We've just moved into a bigger house and there's a lot to do.Let's ________it. A．keep up with                 B．do away with C．get down to                  D．look forward to 答案：C下列实例中，属于光的折射现象的是A. 阳光穿透茂密的树叶间隙，在地面形成圆形光斑 B. 人在路灯下行走，地面上会出现人的影子C. 斜插在水中的筷子“变弯”了 D. 湖边垂柳在湖面形成美丽的倒影