第15题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard.[A] Computers can bring financial problems. [C] Computers can be very useful in families. [B] Computers can bring unemployment. [D] Computerized robots can take over some unpleasant jobs. 参考答案:A 答案解析:[听力原文] According to the passage, what is not mentioned about computers
第25题: [多项选择]停车信号用红色灯的原因是()。 A. 在所有的可见光中,红光的波长是最长的,空气对红光的散射作用最弱,它可以传得较远 B. 红光方向性好,能直射到很远的地方 C. 红色会引起人视神经细胞的扩展反应,是一种使人兴奋的扩张色,比较醒目 D. 红色信号灯常常作为各种危险、警示的信号灯,容易使人警觉 参考答案:A, C