对于一个绕组有分接开关的多绕组变压器，可只测量带分接开关绕组对一个绕组所有分接头的变压比，而对第三绕组只测（）。
参考答案：额定变压比
The hunter insisted that he _____ a tiger and that a searching team ______ to hunt for it. [ ]
A. has seen; be set up
B. had seen; be set up
C. saw; would be set up
D. should see; should be set up
一定条件下，能使二氧化碳还原的物质是（ ）
A．氧气
B．盐酸
C．焦炭
D．一氧化碳
