当天然水中的总碱度＝总硬度时，水中必无永久硬度。（） 发布时间：2019-08-18 06:53 │ 来源：www.tikuol.com 题型：判断题 问题： 当天然水中的总碱度＝总硬度时，水中必无永久硬度。（）
题型：判断题 小阳想利用两块电流表和阻值已知的电阻R0测量电阻Rx的阻值。他选择了满足实验要求的器材，并连接了部分实验电路，如图所示。（1）请你帮小阳连接好电路；（2）闭合开关S1、S2时，电流表A1和电流表A2的示数分别为I1、I2，请你用I1、I2和R0表示出Rx，Rx= 。 查看答案
题型：判断题 阅读下篇材料，从所给的A-F六个选项中，选出五个正确的选项填空，使短文通顺、内客完整。 Anger is a kind of feeling 1 . When your teacher gives you too much homework, when your team loses an important game, when a friend borrows your favorite thing and then breaks it, you may get angry. 2 . For example, you breathe faster, your face turns red, and you may want to break something or hitsomeone, but sometimes you hide your anger. For example, you may hide it in your heart. The problem is that if you do this, you may get a headache or your stomach may hurt. In fact, it's not good to hide your anger, and it's normal for you to get angry sometimes. 3 . When you get angry, you can talk about it with adults such as parents, teachers, etc. 4 . Here are some other thingsyou can do when you start to feel angry: count from 1 to 100; give someone a hug; go for a bike ride; think about good things, etc. Remember that when you are angry, how you act can make everything better or worse. 5 . A. But anger must be let out in the right way, without hurting others or yourself. B. Don't let your anger control you. C. As soon you can find your problems, you may cry to relax. D. Usually, your body will tell you when you are angry.E. After doing that, you'll find those bad feelings can start to go away. F. Many things can make you angry. 查看答案
题型：判断题 下列哪些施工项目属于超过一定规模的危险性较大的分部分项工程：（）。A、搭设高度24m（不含24m）以上，50m（不含50m）以下的落地式钢管脚手架工程B、搭设高度50m及以上落地式钢管脚手架工程C、提升高度150m及以上附着式整体和分片提升脚手架工程D、架体高度20m及以上悬挑式脚手架工程 查看答案
