相关考题
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单项选择题
Officers observe ships with a pair of （）（望远镜）.
A.sextant
B.binoculars
C.compass
D.radar -
单项选择题
The （）（天线）is like a dish.
A.line
B.thread
C.aerial
D.wire -
单项选择题
This is a radio （）（测向仪）.
A.compass
B.direction finder
C.loran
D.sextant
