微波站、电视台、卫星通信地面站等机房屋顶应设避雷网,其网格不大于()。
A.2m×2m
B.3m×3m
C.4m×4m
D.5m×5m
参考答案:B
Woman: Lots of people enjoy dancing, do youMan: Believe it or not, that’s the last thing I’d ever want to do.Question: What does the man mean().
A. He believes dancing is enjoyable.
B. He definitely does not like dancing.
C. He admires those who dance.
D. He won’t dance until he has done his work.
经皮穿刺椎间盘切除术后4天出现剧烈腰痛,同时出现发热,双下肢出现运动或感觉异常.最常见于哪种情况()。
A.神经损伤
B.椎间盘感染
C.椎体滑脱
D.局部血肿
E.纤维环破裂