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根据有关规定，增值税纳税义务发生时间为：纳税人发生应税行为并收讫销售款项或者取得索取销售款项凭据的当天，取得索取销售款项凭据的当天是指书面合同确定的付款日期。（）A.
正确
B.
错误
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【单选题】First Planet from the Sun Mercury, the planet nearest the sun, is difficult to observe from the Earth because it rises and sets within two hours of the sun. ______【46】 Planetary scientists can estimat...
A.
Some regions on Mercury are heavily cratered, suggesting that they are very old surfaces that were probably formed about 4 billion years ago
B.
The crater was probably created by the impact of a large planetesimal when Mercury was forming
C.
Consequently, little was known about the planet until the Mariner 10 spacecraft made several flybys in 1974 and 1975
D.
Mercury is much smaller than the Earth
E.
The surface gravity is about one-third as strong as Earth's, and a thin atmosphere surrounds the planet
F.
These plains have relatively few impact craters (46)
【简答题】Which planet is the closest planet to the sun? Mercury, Mars, Venus or Jupiter?
【简答题】Our planet is in trouble．Polluting industries and corporations are destroying our planet, resulting in increasing global temperatures, melting ice caps, and economic turmoil（混乱）．All across the country...
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