某人用图所示的两种方法分别将同一物体匀速提升相同的高度,不计摩擦和绳重,他所做的 发布时间:2017-07-22 18:25 │ 来源:www.tikuol.com 题型:填空题 问题: 某人用图所示的两种方法分别将同一物体匀速提升相同的高度,不计摩擦和绳重,他所做的有用功W甲____W乙,两种装置的机械效率η甲______η乙。(选填“>”、“=”或“<”)
题型:填空题 从方框中选择合适的应答语,其中有两项是多余的。A:Michael ,do you like sports?B:Of course I do .Sports are good for our health .A:小题1:___________B:Football .A:小题2:____________B:Four times a week .小题3:___________.What’s your favourite sport ?A:I don`t like sports at all .But I like watching TV. B:小题4:__________.A:I watch TV every day .B:Really 小题5:___________A:Three hours .B:Watching TV too much is bad for your eyes .A. How about you ? B. How often do you play football ?C. How often do you watch TV? D. What’s your favorite sport ?E. How much do you play football? F. How many hours do you watch TV every day? G. What did you do ? 查看答案
题型:填空题 在Photoshop中打印文件时,有关Bleed(出血)的说法正确的是?A.出血是在图像内打印裁切标志B.出血是在图像外打印裁切标志C.出血的数值设定范围是0.00-3.18毫米之间D.出血可以打印出图像周围的黑色边框 查看答案