（）常用作高噪声环境中的报警装置。 ["峰鸣器","电铃","角笛和汽笛","警报器"]
Which two produce the output "one， two and three"？（） [" ${param.num[0].[1] and [2]}"," ${param.values[0].[1] and [2]}"," ${param.num[0]}， ${param.num[1]} and ${param.num [2]}"," ${param.values[0]}， ${param.values[1]} and ${param.values [2]}"," ${param.values["num"][0]}， ${param.values["num"][1]} and ${param.values["num"][2]}"," ${param.values.num[0]}， ${param.values.num[1]} and ${param.values.num[2]}"]
简述脊椎动物的主要特征。
下列关于注册会计师审计高新技术产品收入的实质性分析程序表述错误的是（）。 ["A.将本期的高新技术产品收入与上期的高新技术产品收入进行比较，分析产品销售数量和销售周期变动是否异常，并分析异常变动的原因 ","B.比较本期各月各品种高新技术产品收入的波动情况，分析其变动趋势是否正常，是否符合申报企业的经营规律（如季节性、周期性等），查明异常现象和重大波动的原因 ","C.将本期主要高新技术产品的销售数量、价格、毛利率与同行业企业本期相关资料进行对比分析，检查是否存在异常 ","D.计算本期主要高新技术产品的毛利率并与上期比较，关注收入与成本是否配比，检查是否异常，两期之间是否存在异常波动，如有异常波动，应当查明原因"]
Which two statements about MAC addresses in the Cisco UCS are true?（） ["The first 2 octets represent the manufacturer OUI.","The first 3 octets represent the manufacturer OUI.","The last 3 octets are assigned by the organization itseIf.","The last 4 octets are assigned by the organization itseIf."]
简述公司侵权责任的构成要件
