问题
单项选择题
关于程序下列叙述错误的是（）
A.为进行某项活动或过程所规定的途径
B.程序性文件是实验室人员工作的行为规范和准则
C.程序有管理性的、技术性的和管理兼技术性的三种
D.程序可以形成文件，也可以不形成文件
E.凡是形成文件的程序，称之为“书面程序”或“文件化程序”
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
关于程序下列叙述错误的是（）
A.为进行某项活动或过程所规定的途径
B.程序性文件是实验室人员工作的行为规范和准则
C.程序有管理性的、技术性的和管理兼技术性的三种
D.程序可以形成文件，也可以不形成文件
E.凡是形成文件的程序，称之为“书面程序”或“文件化程序”
参考答案：C
| 用所给出的词选词填空，每个词只能用一次。 | |
1. I some clothes to charity because they were too small for me. 2. There's a good movie on TV tonight but it's at 1am. I don't want to that late. 3. I prefer lemons to oranges. I like the taste. 4. I eating ice cream on a hot day. There's nothing better ! 5. Shanghai is cold this time of year. You need to warm clothes if you go there. 6. On weekends I like to ______ at the club with my friends. 7. Sally me to her birthday party. It's at her house on Saturday. 8. She likes cookies. They are hard, dry and easily broken. 9. I hamburgers! They make me feel sick. 10. We're going to Africa on vacation. We to see some elephants. 11. Jim his father. They are both clever and a bit quiet. 12. Do you know where John is? He was going to meet me earlier but he didn't . |
实验室通过简单的“试管实验”，即可探索元素的金属性、非金属性的强弱，请你选用下列试剂，根据实验要求完成下表．
试剂：镁条、铝条、氯水、AlCl3溶液、MgCl2溶液、NaBr溶液、氢硫酸、水、NaOH溶液
| 实验方案（只要求填写选用试剂） | （1） | （2） |
| 实验现象 | 针对方程式①②或③______ ______ ______． 针对方程式④______ ______． | 溶液由浅黄绿色变成橙黄色 |
| 有关反应的离子方程式 | ①Al3++3OH-═Al（OH）3↓ ②Al（OH）3+OH-═AlO2-+H2O 或③Al3++4OH-═AlO2-+2H2O ④Mg2++2OH-═Mg（OH）2↓ | |
| 结论 | 金属性：Mg＞Al | 非金属性： |