搜题请搜索小程序“爱下问搜题”
问题 选择题

从100 mL溶质的质量分数为10%的硫酸溶液中倒出20 mL，剩下的溶液中溶质的质量分数（　　）

A．8%

B．10%

C．12.5%

D．80%

答案

根据溶液的均一性、稳定性可知，从100 mL溶质的质量分数为10%的硫酸溶液中倒出20 mL，剩下的溶液中溶质的质量分数仍然是10%．

审视A、B、C、D四个选项，发现，只有B选项是正确的．

故选B．

填空题



Every human being is fallible; we make mistakes. In America when a mistake has been made, it is considered fitting for the person (1) to acknowledge his or her error and to apologize to anyone who has been inconvenienced. Even (2) are expected to admit their mistakes and apologize for them. Trying to (3) a mistake and denying your guilt are considered to be indicative of serious (4) .
If you make a mistake that (5) a group of people, a public apology is considered the best method for (6) . If the mistake was a serious one, or if some people were inconvenienced more than others, then the (7) should follow the public apology with private ones to (8) .
It is especially important for executives and company heads to be able to admit their mistakes. Sometimes leaders are afraid that if they (9) , they will lose the respect of their employees. Actually (10) — if you are honest with your employees and yourself, (11) , and show that you are willing to accept blame when you make a mistake, then your employees will be (12) you. They will also be more likely to admit their own mistakes.
If you (13) one person, it is usually best to apologize to that person alone, unless your mistake (14) by a large group of people. For example, if Leonard (15) to Mr. Todd during a committee meeting, it would be (16) for Leonard to apologize to Mr. Todd at the next committee meeting. If the (17) created by the initial mistake is public, then the apology should be public. However, if Leonard raised his voice to Mr. Todd when only the two of them (18) , he may apologize privately. Notice as well (19) the apologies are. As soon as you realize you have made a mistake, you should (20) .
查看答案
名词解释

自然资源
查看答案