单选题
Disastrous explosions have been caused by accumulations of oil or oil vapour in air lines not drainedAccording to the above sentence, which of the following statements is true?（）
发布日期：2021-03-22
Oil vapour in air piping are dangerous
Explosion will cause oil vapouring in air lines
Oil vapour in air piping should be drained
Oil in air piping should not be drained
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德国伦琴提出（）
（）是对不同方案，通过采用多个指标，列成平行表进行综合比较，评定其经济效果的优劣，从中选择最优方案的一种分析方法。
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旅游区森林起火原因主要有哪些？
搬运脊椎骨折病人严禁使用软担架的原因是：
灌溉工作制度分为（）。
深昏迷与中度昏迷最有价值的鉴别是（）.
西方国家大、中型银行的建设必须聘请犯罪预防专家参与工程设计。
整治建筑物护根一般用抗冲、适应基础变形的（）材料修筑而成。
对肝炎患者用过的餐具进行消毒最好选用（）。
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