要完成实验操作，常需要先进行一些操作．下列对应不正确的是（  ）

叶圣陶在一则日记中写到：“课毕后阅报纸，见专电栏中有云：武昌已为革（命）党所据，新军亦起而相应……从此而万恶之政府即以推倒，亦未可知也。”日记中的“万恶之政府”指（　　）

I am on the way
I have been dreaming of being a volunteer1 I entered the university． Last summer, I could finally become a volunteer after the end　term  examination．
Step1 First experiencing
I thought I could have a good 2． But when I faced so many strangers, also my new workmates for the first time, I got nervous and  3almost all the time．
Step2 Start work
My first job of volunteering was 4 in summer． The kids were from families 5 low income(低收人)．They were at different 6，from primary school pupils to high school students．We talked about the 7，sadness and happiness．I told them that lessons were much more important than money，though I knew they did not have 8 lives．I 9that my experience would help them．
10，we needed to make better plans，and sometimes we didn’t know what to do at all，especially when11happened．
Step3 Wishes
I also12the older serving group．It seemed 13 more difficult to communicate with elders．I really hoped that I could bring14 happiness into their lives and help them more．
Anyway，I am on the way． 1 will15my dream，no matter what would happen the next day．

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将适量的橡皮泥捏在铅笔的一端，能使铅笔竖直浮在液体中，这就制成了一个很有用的土仪器密度计．将它分别放到盛有不同液体的杯中，静止时的情景如图所示．对于这个密度计所运用的知识或用途，下列说法中正确的是（　　）