X-mas

The X'mas dinner is good value at 99 dollars.

一客圣诞大餐才99元,十分划算.

The noise of CT values in homogeneous phantom increased and percentage of normal image decreased with reduction of X-ray exposure. Considering image quality and patient dose comprehensively, the optimized exposure for chest scanning is 25 mAs.

虽然，随X射线曝露量减少，均匀模体断层内CT值噪声增加、正常图像百分率下降，但从图像质量、病人剂量综合考虑，X射线胸部CT扫描的曝露量宜取25mAs。

Merry X'mas and happy new year to you all!

祝愿我的车友们、车迷们、朋友们圣诞及新年快乐！

His team of reindeers and elfs are locked in an intense competition for the honour to guide his sleigh for X'Mas.

他的驯鹿队和精灵车夫正在进行一场竞赛，快来引导他们赢得冠军！