用NaOH标准溶液标定HCl溶液浓度时,以酚酞作指示剂,若NaOH溶液因贮存不当吸收了CO2,则测定结果偏高。( )
参考答案:对
I am worker at the tap water company. I find that 1. __________
people were becoming more and more careful about 2. __________
health .If the tap water appear a little bit unclear 3. __________
and muddy, the telephone will ring again and again. 4. __________
Fortunately, people do not pay equal attention to the 5. __________
protection of water resources .For the sake of our 6. __________
health, we should take good care our water resources 7. __________
and environment. There is a saying “whether we do 8. __________
not careful protect our environment, the last drops 9. __________
of water we will see them will be our own tears.” 10. __________
无权限人假冒或虚构人名义签章的行为称为变造。()