The exam is coming, so I am doing my ________ to work hard ________ Japanese.
A:better; with
B:best; at
C:well; to
D:best; with
看图列式
若|a+3|+(b﹣2)2=0,则(a+b)2015的值为( )
下列有关化学科学家成就的叙述不正确的是( )