在哥德巴赫猜想问题上取得迄今最大进展的数学家是( )
A．陈景润
B．布拉格
C．莱布尼茨
D．冯·诺伊曼
参考答案：A
One of the requirements for a fire is that the material ____ to its burning temperature.
A．is heated
B．will be heated
C．be heated
D．would be heated
探照灯发射出的光线，给我们的形象似（ ）
