邓稼先的主要贡献包括()
A、实现了原子弹和氢弹原理的突破
B、解决了数学界的世界难题
C、原子弹和氢弹实验的成功
D、原子弹和氢弹的武器化
参考答案:A, C, D
You'd better go there by train. The train ticket is _____ the airplane ticket. [ ]
A. as cheap three times as
B. as three times cheap as
C. three times cheaper than
D. cheaper three times than
在下列选项中挑选属于抹内饰范围的是()
A.黑色毛巾
B.油门踏板
C.座椅底部
D.空调口