目前，一种叫做“驾驶员警报器”的产品被开发出来，计划在12个月内投入市场。它可能使因驾驶疲劳而导致交通事故的风险降低20%-40%。从这段文章可以推导出，“驾驶员警报器”：
A．是为了降低因疲劳而导致的交通事故
B．是为了阻止司机打瞌睡
C．已经通过实验测试
D．已经销售了12个月
参考答案：A
解析：解析；文中提到“驾驶员警报器”可能使因驾驶疲劳而导致交通事故的风险降低，所以可以确定A是正确的，B并不是这个“驾驶员警报器”的目的；文中提到“驾驶员警报器”被开发出来，并没有说有没有通过实验测试，所以B不正确；文中提到“驾驶员警报器”计划在12个月内投入市场，并不是说它已经销售了12个月，所以，D是不正确的。故本题选A。
根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。（每词限用一次）
Long ago, there lived a learned man in Greece. He was well-known (1) his wide knowledge. And lots of people from all over the country came to (2) things from him. The great man taught his students with all his heart and (3) their questions with great patience. One day a student (4) him, “My dear teacher, didn’t you say you have many more questions than we do? But we think we students have a lot more than you.” With a (5), the teacher drew two circles — one is as (6) as a big plate (盘子), and the other smaller. “Of course, I’ve learned much more. But I don’t think I know all you know. Now, look at these two circles. Inside the big one is my knowledge of things, (7) inside the smaller one yours. Out of the circles is what we don’t know. My circle is larger, so its line is longer. That (8) I have more opportunities to meet with what we don’t know. And that’s (9) I myself have more questions than you do. The more you learn, the more (10) you’ll have. You will never learn enough, you know.” |