难治性消化性溃疡的危险因素不包括()
A.高酸分泌
B.持续服用非甾体抗炎药
C.持续服用皮质激素
D.持续的Hp感染
E.长期饮食无规律
参考答案:E
_____ you are, _____ mistakes you will make in the test. [ ]
A. The more careful; the fewer
B. The more carefully; the fewer
C. The more careful; the less
D. The more carefully; the less
采气树对阀体内腔润滑主要包括采气树下主阀、地面安全阀、手动清蜡阀、翼阀,每半年一次使用高压注脂枪对阀腔加注专用润滑脂然后保持全开全关一次。