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【单选题】
给下面脂环烃命名正确的是：A.
环十一烷
B.
环癸烷
C.
十二烷
D.
环十二烷
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【单选题】Australian Agricultural and Rural LifeFor many years, wool was the most important product to the Australian economy. The wool industry dates from 1797,when John Macarthur and Reverend Samuel Marsden i...
A.
At the beginning, the fat-tailed sheep was mainly used for food but not wool trade.
B.
Th e first Australian wool was sold in London.
C.
Current Australian Labor Party initially consisted of a group of shearers .
D.
Australian sheep producers now tend to focus on the production of wool.
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【多选题】下列关于变压器无励磁调压描述正确的说法有()。
A.
二次侧带负载
B.
一次侧也与电网断开
C.
一般无励磁调压的配电变压器的调压范围是±2x2.5%
D.
二次侧不带负载
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