倒车雷达
参考答案：
汽车泊车或者倒车时的安全辅助装置，能以声音或者更为直观的显示告知驾驶员周围障碍物的情况，解除了驾驶员泊车、倒车和起动车辆时前后左右探视所引起的困扰，并帮助驾驶员扫除了视野死角和视线模糊的缺陷，提高驾驶的安全性。现在一般的家用轿车只装有后方倒车雷达，只能监控后方的障碍物。而高档轿车前方甚至两侧都会装有雷达，这样前后左右的障碍物都能够勘测到。
| 根据对话内容及方框中所给的句子补全对话.其中有一项是多余的。 | |
| Boy: Mom, what did you do today? Woman: I cleaned your room and I am so tired now. Boy: Mom,1．___________ Woman: Because it was dirty. I don't know how you can live in that room.2．____________ Boy: Well, I used to be able to find things. 1 used to know where everything was,but now that you've tidied up I can't find anything! Woman: What are you looking for? Boy: Well, for a start,3._______I need to do my homework. Woman: It's behind your door, where it should be! Boy: And what about my watch? It was on the dresser next to my bed.4．____________ Woman: That's in the dresser drawer so you won't lose it! And I put your CD player there too. Boy: Well, my basketball's gone too. You couldn't have put that in the drawer. Woman: No, that's in the box next to the bookshelf. And I put your keys on your bookshelf. Boy: Oh, OK. I can find everything now. 5.______ I'll try to keep it tidy in f uture.
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