在SIEMENS PLC的编程语言中，FB表示的是（），常用于完成重复出现或复杂的功能。
A.功能块
B.组织块
C.程序块
D.数据块
参考答案：A
Questions 1-4
Where was the man when the football match took place on Saturday？（）
A．He was attending a wedding ceremony.
B．He was on his way to Edinburgh.
C．He was in the football stadium.
D．He was in the cinema, with the woman.
对血浆、原尿和尿液中四种物质浓度（克/100毫升）进行比较，错误的是（ ）
A．蛋白质：血浆=原尿
B．尿素：原尿＜尿液
C．无机盐：血浆=原尿
D．葡萄糖：原尿＞尿液
