在带控制点工艺流程图中，仪表位号的第一个字母表示（）。
A、被测变量
B、仪表功能
C、工段号
D、管段序号
参考答案：A
We were sad to hear the news that eight Chinese peace-keeping policemen were killed in Haiti earthquake.
A．the ;/
B．/;the
C．the ; a
D．an; the
DEU执行关断以后需要多长时间重新启动（）
A.60S
B.90S
C.120S
D.30S
