压缩机润滑油油路系统的储压器应充氮气到规定压力并保持()小时检查无泄漏。
A.6
B.12
C.24
D.48
参考答案:B
角膜溃疡表面有大量脓性分泌物,发展迅速,很快出现大面积穿孔()。
A.单纯疱疹病毒性角膜炎
B.绿脓杆菌性角膜炎
C.真菌性角膜炎
D.匐行性角膜炎
E.蚕蚀性角膜溃疡
Last month, part of Southeast Asia was struck by floods, from ____ effects the people are still suffering.
A.that
B.Whose
C.those
D.what