翻斗是雨量传感器的重要部分,也是当前自动、遥测雨量计广泛采用的传感系统。 发布时间:2017-07-03 03:42 │ 来源:www.tikuol.com 题型:判断题 问题: 翻斗是雨量传感器的重要部分,也是当前自动、遥测雨量计广泛采用的传感系统。
题型:判断题 John is not a man to count on, and it is very likely that the work ____ by the time he arrives here.[ ]A. is finished B. has finished C. will finish D. will have been finished 查看答案
题型:判断题 如图所示:(1)某同学用燃着的蜡烛去点燃集气瓶中的氢气,发现瓶口出现火焰,而燃着的蜡烛伸入集气瓶中却熄灭了;(2)当把已经熄灭的蜡烛从集气瓶中拿出后,发现蜡烛又重新燃烧起来.这个实验说明氢气具有的性质是:(1)______(2)______(3)______. 查看答案