提速铁路货车“全面检全面修”检查范围和质量标准对滚动轴承检查是如何规定的?
参考答案:
消除热轴故障;滚动轴承无甩油,外圈、前盖、轴箱无裂损,密封罩、轴端螺栓无脱出。
The food ________ because it _________ good.
A. sold out soon; was tasted
B. was soon sold out; tasted
C. has soon sold out; tasted
D. will soon sold out; tasted
男,38岁,钡餐示食管壁张力减低,蠕动减弱,钡剂排空延迟,并见食管下段有串珠状充盈缺损影,首先应考虑()
A.食管下段静脉曲张
B.食管粘膜下平滑肌瘤
C.返流性食管炎
D.食管裂孔疝
E.食管癌