为优化免洗小米抛光工艺,在单因素试验基础上,选择上光剂的浓度、温度和添加量为自变量,洗米水的浊度为响应值,根据中心组合试验设计原理采用3因素3水平响应面分析法,模拟得到二次多项式回归方程预测模型,并确定免洗小米抛光的最佳工艺条件为:浓度30%、温度30℃、添加量1%,浊度为54.8NTU。
1 M2 U1 单项选择 1. It is reported that the police will soon ________ the case of two missing children. A. look upon B. look after C. look into D. look out [解析 ] C 考查动词短语辨析。根据题意可知应选 look into “调查”。 2. I am ________ that Peter is guiltless unless you can show me ________ evidence. A.convincing; convincing B.convinced; convinced C.convinced; convincing D.convincing; convinced [解析 ] C 考查现在分词和过去分