采用热装法装配轴承时,将轴承放入机油槽中加热,温度不超过()℃为宜 A.200 B. 发布时间:2019-01-22 00:38 │ 来源:www.tikuol.com 题型:单项选择题 问题: 采用热装法装配轴承时,将轴承放入机油槽中加热,温度不超过()℃为宜A.200B.150C.100D.50
题型:单项选择题 Not only Tom but also Jack __ to that city several times.?[ ]A. have beenB. has beenC. have goneD. has gone 查看答案
题型:单项选择题 患者男,53岁。反复上腹痛2年,发作无规律,间断服用中成药治疗,症状控制不佳。近2个月来腹痛加剧伴黑便1次。平素工作繁忙,饮食欠规律。为明确诊断,首选的检查应是()A.上消化道钡餐造影B.上腹部增强CTC.上腹部MRD.常规胃镜检查+活检病理E.DSAF.Hp血清学试验G.PET-CT 查看答案