— _________ my dictionary? I can't find it anywhere.
— I ________ it on the shelf when I came in.
给下列问句选择合适的答语。
A. Yes, it is．
B. I'm 1.7metres．
C. I'm 58 kilograms．
D. A pair of sports shoes．
E. I think Mike's are bigger than mine.
判断
如果用a表示自然数，那么2a一定是偶数
下列函数中，属于反比例函数的是（ ）
