问题
单项选择题 B型题
让病人双手抱紧健侧膝部，骨盆平置，则患侧下肢不能伸直，此时为（）
A.拾物试验阳性
B.浮髌试验阳性
C.托马斯征阳性
D."4"字试验阳性
E.直腿抬高试验阳性
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
让病人双手抱紧健侧膝部，骨盆平置，则患侧下肢不能伸直，此时为（）
A.拾物试验阳性
B.浮髌试验阳性
C.托马斯征阳性
D."4"字试验阳性
E.直腿抬高试验阳性
参考答案：C
从下面方框中选择恰当的词填入短文中，使短文通顺正确。每词只用一次，有些词要用适当形式
Friendship(友谊) is an important part of our life. Life is always 小题1:______________ , such as moving to a new place and starting a new job. So we often need to make new friends. But some people think it is小题2:______________to make new friends. Here is some 小题3:________________ for you. If you want to make friends, you need to go out at first instead of (代替) staying at home. You can join a club because there are many people who have common (共同的) interests. It is easy to start a new friendship if you have the 小题4:______________ interests. And you can join a sports team. It is 小题5:_____________ a great way to make new friends. After joining a club or a sports team, you still can’t make friends if you don’t talk to people. You will have a good小题6:_______________ to make a good friend if you talk to someone. 小题7:______________ you talk to people, you should be friendly and smile at them. The above(上面的) advice can 小题8:______________ you make friends. But if you want to find the true friendship, you should be honest with them. |
（10分）金属镁可与热水反应生成一种碱和一种气体。某同学将镁条放在热水中煮沸，趁热取出部分溶液，滴加酚酞试液，溶液变为红色，放置在空气中一段时间后，发现溶液的红色褪去了。请根据以上信息回答：
（1）同学们根据质量守恒定律，对生成的气体进行了两种推测：推测一：该气体是氢气；推测二：该气体是氧气。请选择上述任意一种推测进行实验验证。（3分）
| 实验步骤 | 实验现象 | 实验结论 |
（3）请你对放置一段时间后溶液红色褪去这种现象进行探究。(只要提出假设、方案，不需要说出方案实施的具体结果)（5分）
假设一： 热的Mg(OH) 2溶液与空气的CO2反应，生成盐，溶液褪色。
方案一：向热的Mg(OH)2溶液中滴加酚酞试液，再通入CO2，观察溶液颜色变化。
假设二：_____________________________。方案二：_____________________________。