抛物线y=x2﹣mx﹣m2+1的图象过原点,则m为[ ]
A.0
B.1
C.﹣1
D.±1
答案:D
对于随同商品出售而不单独计价的,企业应按实际成本计入销售费用。
用所给词的适当形式填空。
1. The book is very _____ (interest) and the boy is _____ (interest) in it.
2. You must stop _____ (talk) when class begins.
3. I found Mary _____ (sit) in the corner of the room.
4. At the_____ (begin) of the garden tour, the children are always happy.
5. —How many _____ (tomato) pizzas would you like? —Two.