My cousin wants to be a like Lang Lang.Because he likes playing the piano too.
A:player
B:waiter
C:musician
D:teacher
已知函数f(x)=ax+xlnx(a∈R)
(1)若函数f(x)在区间e,+∞)上为增函数,求a的取值范围;
(2)当a=1且k∈z时,不等式k(x﹣1)<f(x)在x∈(1,+∞)上恒成立,求k的最大值.
“观察DNA和RNA在细胞中的分布”实验中没有用到的试剂是( )