问题
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0,2,24,252,()A.625 B.1024 C.2860 D.3120
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0,2,24,252,() A.625 B.1024 C.2860 D.3120
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用简便方法计算.1.25×4×2.5×0.88.08×1.252.5×(40--0.4)99×0.453.7×4.3+3.7×1.2+3.7×4.5.
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若120 ×78=9360 ,则7.8 ×1.2=(). 25.2 ÷0.56=() ÷56=252 ÷()=()
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某主机的IP地址为200.15.13.12/22,其子网掩码是()A.255.255.252.0B.255.255.255.0C.255.255.24
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某主机的IP地址为200.15.13.12/22,其子网掩码是()A.255.255.252.0B.255.255.240.0C.255.255.24