对于化学吸附,下面说法中不正确的是()。A、吸附是单分子层 B、吸附力来源于化学键力C 发布时间:2018-03-04 17:51 │ 来源:www.tikuol.com 题型:单项选择题 问题: 对于化学吸附,下面说法中不正确的是()。A、吸附是单分子层B、吸附力来源于化学键力C、吸附热接近反应热D、吸附速度较快,升高温度则降低吸附速度
题型:单项选择题 看图补全对话。( ) 1. How many oranges do you want?A. Yes, please. B. Ten oranges.( ) 2. What colour is it?A. It's black. B. It's white.( ) 3. Two.A. How many tigers are there? B. What are those?( ) 4. Hey, come back! Don't run.A. Be careful!B. You can't catch me.( ) 5. What's this?A. It's a monkey.B. It's a bear.( ) 6. Is that a pear?A. No, it isn't. B. Yes, it is. 查看答案
题型:单项选择题 如图所示,轻质弹簧上面固定一块质量不计的薄板,竖立在水平面上.在薄板放一重物,用手将重物向下压缩到一定程度后,突然将手撤去,则重物将被弹簧弹射出去,则在弹射过程中(重物与弹簧脱离之前)重物的运动情况是( )A.一直加速运动B.匀加速运动C.先加速运动后减速运动D.先减速运动后加速运动 查看答案