将一个预览成功的菜单存盘,在运行该菜单时,却不能执行,这是因为( )。
A.没有放到项目中去
B.没有生成
C.要用命令
D.要编入程序
参考答案:B
The famous scientist, ________ a dinner party will be held tonight, is to arrive soon. [ ]
A. in honor or him
B. in his honor
C. in whose honor
D. in which honor
铝能用于冶炼难熔的金属(如矾、铬、锰等),这是因为铝具有下列性质中的( )
A.金属性和非金属性
B.导电性
C.熔点低
D.还原性,在冶炼反应中放出大量热