— Yes, she always does everything ________.
A:careful; carefully
B:careful; careful
C:carefully; carefully
D:carefully; careful
Where are my basketball?
A B C
____
我国第六次人口普查公布全国人口约为137054万;用科学记数法表示是( )
设a=∫0πsinx+cosxdx,则二项式ax-1x5的展开式中x2项的系数为( )
— Who is singing in the next room?
— It be Lucy. She likes singing at this time.