藏书票一般要有票主的（）或（）。
参考答案：名字；书斋名
设f（x）连续，且满足，则f（x）=（）。
A.
B.
C.
D.
—Is Steve watching TV now?
—_____. He is doing his homework. [ ]
A. He is watching TV
B. He isn't watching TV
C. No, he isn't
D. Yes , he is
，则f（x）=（）。
