单选题
发布日期:2021-03-22
An alarm device with audible and visible signals is required for all cooling water systems
Propulsion engines with bores over 200 mm are to be fitted with cooling water jackets
Each totally enclosed cooling system shall be provided with a suitable head tank
Drain cocks are to be provided at the lowest points of all cylinder water jackets
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肝硬化最严重的并发症是()
布洛芬与消炎痛相比较,其不同于消炎痛的药理作用特点是()
室内给水管道水压试验是在管道系统()对其管道的材质与配件结构的强度和接口严密性检查的必要手段。
上证380指数样本股的选择主要考虑()。 Ⅰ.盈利能力 Ⅱ.成长性 Ⅲ.流动性 Ⅳ.规模
木材船甲板木材积载范围在纵向上应满足()。
密集型购物区有玻璃、木板或者石膏板等简易材料间隔,有一定的损耗,采用()进行覆盖,天线宜安装在交叉路口处,可以辐射更多范围,天线覆盖范围为15-20米。
债券价格与债券到期收益率呈反向变化关系。
书法中的“宋四家”是指( )。
机车无动力装置主要由()和()两部分组成。
收到订单与客户收到货物之间的时间称为()。
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