小李开了一个多小时会议,会议开始时看了手表,会议结束时又看了手表,发现时针与分针恰好 发布时间:2018-01-03 06:08 │ 来源:www.tikuol.com 题型:单项选择题 问题: 小李开了一个多小时会议,会议开始时看了手表,会议结束时又看了手表,发现时针与分针恰好互换了位置。问这次会议大约开了1小时多少分?()A.51B. 47 C.45D. 43
题型:单项选择题 Salesman: $73.07,please. Peter: What? Show me the receipt. Salesman: Here it is. Peter: Look. The price on this shirt is $17. But the receipt says $27. Salesman: You are right. The receipt is wrong. Peter: And what is the $5.57 for? Salesman: That’s for tax(税).小题1: The $5.57 is for the ___________.A.taxB.bagsC.jacketD.shirt小题2: When did Peter do some shopping? A.On June 17.B.At noon.C.On June 25.D.In the morning 查看答案
题型:单项选择题 一位体重为67kg的高中生走进教室,估算该生从教室中排挤出多少个空气分子?(阿伏加德罗常数NA=6.02×1023mol-1,人体平均密度约为1.0×103kg/m3,计算结果保留一位有效数字) 查看答案