【简答题】四种常规热处理中, 最终热处理有 __________ 、 __________ 。
【单选题】——How long has his father ________London? ——For two weeks.
【单选题】Mary has been away from her hometown three years.
【单选题】关于平滑面牙釉质龋显微镜下所见哪项是错误的
B.
牙釉质龋继续发展,牙釉质深层受累,病损区呈三角形
E.
在三角形病损处,可见淡棕黄色色素沉着,其边缘处颜色较深
【单选题】Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.
D.
combustible gas indicator
【单选题】—Hello! May I speak to Alice? —Sorry, she _____ Shanghai.