移动性浊音用于检查
A.胸腔积液 B.腹腔积液 C.心包积液D.胃潴留 E.胃肠穿孔
参考答案:B
根据碘与氢气反应的热化学方程式,下列判断正确的是
① I2(g)+H2(g)2HI(g) △H=-9.48 kJ/mol
② I2(s)+H2(g)2HI(g) △H=+26.48 kJ/mol
(1)写出固态碘生成气态碘的热化学方程式:____________________。
(2)若反应②吸收52.96kJ热量时,转移电子的物质的量是_________mol。
(3)对于在恒温、恒容密闭容器中进行的反应①,能说明其达到化学平衡状态的是_____。
A. 容器中气体压强不变
B. 容器中气体密度不变
C. 容器中气体颜色的深浅不变
D. 有n个H—H键断裂的同时有2n个H—I键断裂
(4)可通过反应2NO+O2=2NO2和NO2+2H++2I-=NO+I2+H2O来制取碘,NO在制碘过程中的作用是______________________。
(5)硫酸工业尾气中二氧化硫的含量超过0.05%(体积分数)时需经处理后才能排放。某校化学兴趣小组欲测定某硫酸工厂排放尾气中二氧化硫的含量,采用以下方案:如下图所示,图中气体流量计B用于准确测量通过的尾气体积。将尾气通入一定体积已知浓度的碘水中测定SO2的含量。当洗气瓶C中溶液的蓝色消失时,立即关闭活塞A。
①用碘水测定SO2的含量的化学方程式是___________________。
②洗气瓶C中导管末端连接一个多孔球泡D,可以提高实验的准确度,其理由是______________________________。
③洗气瓶C中溶液的蓝色消失后,没有及时关闭活塞A,测得的SO2含量_________(填“偏高”、“偏低”或“无影响”)。
句型转换。
1. By comparing with others, you will find your problems are not so terrible. (划线部分提问)
______ ______ you find your problems are not so terrible?
2. It is interesting to send English messages to friends on a mobile phone. (改为感叹句)
______ ______ interesting thing it is to send English messages to friends on a mobile phone!
3. It would be nice if we could get a room with a kitchen so we could cook our town meals. (改为同义句)
It would be nice if we could get a room ______ ______ a kitchen so we could cook our own meals.
4. Being a volunteer is great. (改为反义疑问句)
Being a volunteer is great, ______ ______?
5. The woman teacher asked the students "Can you understand what I am saying?" (改为间接引语)
The woman teacher asked the students ______ ______ could understand what she was saying.