主页
学科
搜索
账户
常见问题
当前学科:掘进工
题目:
单选
掘进机液压系统做耐压试验时,当系统压力小于16MPa时,试验压力为额定压力的()倍。
A . 1.2
B . 1.5
C . 2
D . 2.5
答案:
<查看本题扣1积分>
查看答案
答案不对?请尝试站内搜索
推荐知识点:
爱岗敬业、争创一流,艰苦奋斗、勇于创新,淡泊名利、甘于奉献,这是对()的全面而精辟的概括。
头孢菌素类药物过敏试验法的注意事项
男性,46岁,上腹部胀痛不适4年,近1个月来餐后饱胀感加重,近几天大便潜血阳性。胃酸正常。血清抗壁细胞抗体阴性。该患者胃镜检查见:胃窦部黏膜变薄,可见黏膜下血管网,可见散在小的隆起性病变。最可能的诊断是()
When I was 13 my only purpose was to become the star on our football team. That meant Miller King, who was the best at our school.Football season started in September and all summer long I worked out. I carried my football everywhere for .Just before September, Miller was struck by a car and lost his right arm. I went to see him after he came back from . He looked very , but he didn’t cry.That season, I all of Miller’s records while he the home games from the bench. We went 10-1 and I was named most valuable player, I often had crazy dreams in which I was to blame for Miller’s .One afternoon, I was crossing the field to go home and saw Miller going over a fence—which wasn’t to climb if you had both arms. I’m sure I was the last person in the world he wanted to accept from. But even that challenge he accepted. I him move slowly over the fence. When we were finally on the other side, he said to me, “You know, I didn’t tell you this during the season, but you did .Thank you for filling in for .” His words freed me from my bad . I thought to myself, how even without an arm he was more of a leader. Damaged but not defeated, he was ahead of me. I was right to have him. From that day on,I grew and a little more real.
()是指通过比较各种机械设备的投资回收期,从中选择最短者为最优方案的方法。
根据中国高血压防治指南的标准,正常血压是指()
鼻中隔的骨与软骨支架包括()
口腔检查时上下颌弓的哪种位置关系有利于人工牙的排列()
诸子之说形成一方面来源王官之学的下行,另一个方面是什么?()
某患儿,2岁,1周前受凉,咳嗽,3天来发热,呕吐,烦躁,体检:体温39℃,精神萎靡,脑膜刺激征阳性,为确诊需做腰椎穿刺术。护士配合腰椎穿刺术,以下哪项不妥()