辛烷值越高,汽油的抗爆性能越差。
参考答案:错
Maybe you have been to many countries , but nowhere else ___such a beautiful palace.
A.can you find
B.you could find
C.you can find
D.could you find
金属烤瓷全冠遮色瓷的厚度是()
A.0.5~1.0mm
B.1.0~1.5mm
C.1.2~2.0mm
D.1.5~2.0mm
E.0.1~0.2mm