数电断电后所存信息消失的存贮器是(),不消失是()。
参考答案:RAM、ROM
用所给动词的适当形式填空。
Mum: So many clothes 1_____ (be) on the floor.
Nancy: But I 2_____ (not like) them. Can you 3_____ (buy) me some new clothes, Mum?
Mum: 4_____ (forget) it. Let me 5_____ (see). 6_____ (be not) this skirt nice?
Nancy: Yes, but Kate 7_____ (have) the same one.
Mum: OK. And this?
Nancy: Do you think yellow 8_____ (be) a nice colour?
在梨的果实上造成“豆沙馅”的害虫是()
A.梨大食心虫
B.梨小食心虫
C.苹小食心虫
D.桃小食心虫