标准溶液装入滴定管之前,要用该溶液润洗滴定管2~3次,而锥形瓶也需用该溶液润洗或烘干 发布时间:2018-02-27 18:30 │ 来源:www.tikuol.com 题型:判断题 问题: 标准溶液装入滴定管之前,要用该溶液润洗滴定管2~3次,而锥形瓶也需用该溶液润洗或烘干。
题型:判断题 在对两个变量x,y进行线性回归分析时有以下步骤:(1)利用回归方程进行预测;(2)收集数据(xi,yi),i=1,2,…,n;(3)求线性回归方程;(4)根据所收集的数据绘制散件图.则正确的操作顺序是______. 查看答案
题型:判断题 从B栏中找出与A栏中各句相应的答语。 A ( )1. Are you free this Sunday? ( )2. Would you like to come to Songtao? ( )3. What are your favorite animals? ( )4. What time is it? ( )5. What's wrong with you? BA. It's two to two. B. Yes. What's up? C. I can't find my way home. D. Yes. I'd love to. E. Pandas. 查看答案