Many tests________that people generally feel best under certain temperature,humidity,and air speed conditions. A.will be indicated B.are indicated C.have indicated D.had indicated
答案: C 考查时态和语态。tests和indicate之间是主谓关系,且句中没有表示过去的时间状语,故选现在完成时。句意为:许多试验已经表明,人们在一定的温度、湿度和空气流动的速度下,感觉最舒适。