There are lots of storybooks the students.
A:of
B:for
C:about
D:to
将二次函数y=x2的图象向右平移一个单位长度,再向上平移3个单位长度所得的图象解析式为( )
Good morning, boys and girls. This is Lucy.
下列哪一细菌对人类有害无益 ( )