常见的散布图包括( )。A．强正相关 B．弱正相关 C．不相关 D．正弱相关 E． 发布时间：2023-09-27 07:23 │ 来源：www.tikuol.com 题型：多项选择题 问题： 常见的散布图包括( )。A．强正相关B．弱正相关C．不相关D．正弱相关E．非线性性相关
题型：多项选择题 完形填空。 A group of frogs were traveling 1 the forests, but suddenly two of them fell into a hole. The other frogs tried to help them. When they saw how deep the hole was, they cried to the two frogs that they could not be saved. The two frogs didn't 2 and tried their best to jump up out of the hole. The other frogs 3 saying that they were sure to die. 4 , one of the two frogs, who heard what the other frogs were saying, gave up. Then he fell down and died. The 5 frog, however, continued to jump as 6 as he could, and at last made it out. When he 7 , the other frogs asked, "Didn't you hear us?" The frog, who had a poor 8 , said, "I thought you were encouraging me all the time." The story teaches us a 9 :There is power (力量) of life and death in the tongue. An encouraging 10 to those who are down can help them out while a discouraging word can kill them.( )1. A. across ( )2. A. care ( )3. A. kept ( )4. A. Luckily ( )5. A. another ( )6. A. wide ( )7. A. got out ( )8. A. smelling ( )9. A. way ( )10. A. smile B. through B. understand B. finished B. Finally B. other B. tall B. ran away B. eyesight B. skill B. laugh C. from C. know C. practiced C. Suddenly C. others C. hard C. got off C. hearing C. sentence C. help D. past D. think D. stopped D. Happily D. one D. far D. woke up D. looking D. lesson D. word 查看答案
题型：多项选择题 某同学想用pH试纸分别测定食盐水、稀盐酸、氢氧化钠溶液的pH．他的操作如下：在玻璃片上依次放好三片pH试纸，先用蒸馏水将三片pH试纸润湿后，将被测的三种溶液分别滴到三片pH试纸上，把试纸显示的颜色与标准比色卡比较，得出三种溶液的pH．请你：（1）指出他操作上的错误．（2）具体分析他测得三种溶液的pH与三种溶液实际pH的关系． 查看答案