A:-1
B:1
C:-94
D:-49
已知发f(x-1x)=x2+1x2,则函数f(3)= ____
给下列加线字注音,据拼音写汉字。
遐想____ 海域____ 畅谈____ 阐述____
大shà____ tuǒ____圆 干rǎo____ guǐ____道
—Who Chinese in Class 1 ?
—Miss Luo.She always makes her lessons interesting.