尚压设备上工作需要全部停电或部分停电的需城写签发（）。
A.电气第一种工作票
B.电气第二种工作票
C.倒闸操作票
D.口头或电话命令
参考答案：A
The town _______ we visited last week is the one _______ the famous painter was born.
A．where; which
B．in which; that
C．that; where
D．where; where
板式塔在石化生产装置中主要用于（）过程。
A、精馏
B、吸收
C、解吸
D、抽提
