渣选车间球磨磨矿细度应控制在()
参考答案:≥50(-200目)
Australia is such a splendid country that we've decided to stay for _____ two weeks. [ ]
A. another
B. other
C. the other
D. other's
患者,男性,75岁。上腹部和腰背部疼痛2个月,夜间多明显,前倾坐位时疼痛可以减轻,体重减轻10kg。
其疼痛主要因为()。
A.后腹膜炎性刺激
B.腹前壁受损
C.胃肠道浆膜受侵犯
D.腹腔神经丛受侵犯或压迫
E.膈肌炎性刺激