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单选题
It is difficult to determine which limb of the Moon is fully illuminated（）.
A
when the Moon is low in the sky at rising or setting
B
at the new Moon phase
C
when taking Moon sights during daylight
D
when the terminator is nearly vertical
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考题
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考题
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arpC
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考题
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考题
单选题Which statement is true about import and export routing policies?（）A
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checking the nameplate dataC
weighing by handD
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