【简答题】Questions 31-35 Complete the following sentences using NO MORE THAN TWO WORDS from the text. America's ______ has more than tripled since 1980.
【简答题】Complete the table below with information found in the text. Use NO MORE THAN THREE WORDS OR A NUMBER for each answer. Write your answers in boxes 1-3 on your Answer Sheet.
【简答题】Read the text and put the topic sentences on the blanks to complete the text
【单选题】关于现场总线系统FCS,下列说法中正确的是()。①系统最底层的控制单元均具有数字通信功能②上位机和下位机之间采用4~20mA模拟量信号传输③FCS是1对N结构,即一条数字通信线连接N个设备,故FCS能大大减少连接电缆④目前,机舱现场总线的标准已经统一为LonWorks标准
【简答题】Complete the flow chart below using in formation from the text. Use NO MORE THAN THREE WORDS for each answer. Write your answers in boxes 17-20 on your Answer Sheet.
【单选题】关于现场总线系统 FCS ,下列说法中正确的是一一一一一。①系统最底层的控制单元均具有数字通信功能;②上位机和下位机之间采用 4 20 mA 模 拟量信号传输;③ FCS 是 1 对 N结构,即一条数字通信线连接 N个设备,故 FCS 能大大减少连接电缆;④目前,机舱现场总线的标准已经统一为 Lon Works 标准。
【判断题】"Disasters" in the text means "a complete failure".
【判断题】上级低压断路器的保护特性与下级低压断路器的保护特性应满足保护迭择性的要求。
【简答题】小企业持有固定资产的目的,是为了生产商品、提供劳务、出租或经营管理的需要,也可直接用于出售。 判断对错