已知a>b,下列不等式中错误的是( )
A:a+1>b+1
B:a﹣2>b﹣2
C:﹣4a<﹣4b
D:2a<2b
Name
Li Mei
Age
13
Study at
No. 1 Middle School, Class 8, Grade 7
School
not very big, trees, flowers
a school library, a reading room……
Teachers
kind ……
After-school activities
play tennis, swim……
My school
草履虫是单细胞生物,没有专门的运动器官,可以靠____ 的摆动在水中做旋转式前进,氧气的摄入和二氧化碳的排出通过____ 实现.
两边同时加入金属后,哪边反应快?____.
两边同时加入固体后,哪边试管璧热____.
通电一段时间后,试管里哪边液面高____.
取下镁带点燃后,将生成物全部放回,哪边重?____.