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【多选题】
时期指标的特点有( )。A.
可以连续计数
B.
只能间断计数
C.
数值的大小与时期长短有关
D.
数值可以直接相加
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【简答题】Every year thousands of tourists visit Pompeii, Italy. They see the sights that Pompeii is famous for ― its stadium (露天大型运动场) and theatres, its shops and restaurants. The tourists do not, however, see...
【简答题】Every year thousands of tourists visit Pompeii, Italy. They see the sight that Pompeii is famous for—its stadium and theaters, its shops and restaurants. The tourists do not, however, see Pompeii’s pe...
【简答题】Every year thousands of tourists visit Pompeii, Italy. They see the sights that Pompeii is famous for—its stadium(运动场)and theatres, its shops and restaurants. The tourists do not, however, see Pompeii...
【简答题】Every year thousands of tourists visit Pompeii, Italy. They see the sights that Pompeii is famous for-its stadium and theatres, its shops and restaurants. The tourists do not, however, see Pompeii’s p...
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