I jumped on the train, but it __________ ready.[ ]
A. aren't
B. wasn't
C. isn't
答案:B
男患,50岁。2小时前木棒击伤左颞部,伤后头痛,呕吐,1小时前意识不清,查体中度昏迷,左瞳散大,右侧肢体病理征(+),诊断考虑为
A.颅骨凹陷骨折伴脑疝
B.硬膜下血肿伴脑疝
C.硬膜外血肿伴脑疝
D.脑损伤伴脑疝
E.原发脑干损伤
下列牌号的砂轮,磨粒尺寸最小的是()
A、60#;
B、46#;
C、50#;