A、has a declination equal to twice that of the Sun
B、comprises two stars that appear close together
C、is twice as bright as a single star
D、suddenly becomes much brighter and then fades
更多“A double star is a star that（）.”相关的问题
A、double star B、variable star C、nova D、nebula
A、2.5 times as bright as a second magnitude star B、3 times as bright as a second magnitude star C、5 times as bright as a second magnitude star D、10 times as bright as a second magnitude star
A、Primer is used for sea water tanks and double bottom tanks. B、Cement wash is used for fresh water tanks and double bottom tanks. C、Varnish is used for fresh water tanks and double bottom tanks. D、Bitumen is used for fresh water tanks and double bottom tanks.
A、concentrated high and the double bottoms empty B、concentrated low and the double bottoms empty C、evenly distributed vertically with the double bottoms full D、concentrated and with the double bottoms full
A、concentrated high and the double bottoms empty B、concentrated low and the double bottoms empty C、evenly distributed vertically with the double bottoms full D、concentrated and with the double bottoms full
A、concentrated high and the double bottoms empty B、concentrated low and the double bottoms empty C、evenly distributed vertically with the double bottoms full D、concentrated and with the double bottoms full
A、Press up any slack double-bottom tanks to eliminate free surface B、Flood any empty double-bottom tanks to add weight low and down C、Jettison topside weights to reduce KG and KB D、Shift any off-center weights from port to starboard
A、quartered B、unchanged C、doubled D、quadrupled
A、horizontal motion of a white flag B、letter K in Morse code given by light C、code flag S as a hoist D、firing of a white star signal
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