使用救生气垫的注意事项有()。
A、注意避免尖锐物体
B、防止被划伤或磨损
C、避免接触油类及腐蚀性物品
D、注意使用高度
E、气垫充气不能太足
参考答案:A, B, C, D, E
My watch ______. I have looked for it everywhere but still _________ it.[ ]
A. has lost; have not found
B. has lost; do not find
C. is missing; have not found
D. is missing; do not find
一氧化碳中毒时下列叙述不正确的是()
A.老人和孩子易患
B.老人应与脑血管意外相鉴别
C.严重中毒血液COHb浓度可高于50%
D.应立即原地抢救
E.迟发脑病恢复较慢