My father________the shopkeeper 400 yuan for that new bike.
A:asked
B:charged
C:sold
D:offered
已知函数f(x)=f′(π4)cosx+sinx,则f(π4)的值为____
看拼音写词语。
zhī qián
xǐ huān
gǎn xiè
tiān shǐ
xiǎnɡ liànɡ
____