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单选题 data={'Ohio':3500,'Texas':7100,'Oregon':1600}obj3=Series(data)states=['California','Ohio','Texas','Oregon']obj4=Series(data,index=states)obj3+obj4输出结果为
学科：默认课程
时间：2026-03-13 23:31:56
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题目1单选题
下方哪一个代码可以生成一个值为[1,2,3,4],索引为['a','b','c','d']的Series对象A. obj2=Series([1,2,3,4],index=['a','b','c','d'])B. obj2=Series([1,2,3,4])C. obj2=Series(1,2,3,4)D. obj2=Series(['a','b','c','d'])
题目2单选题
已知一个Series对象A为:a 1b 2c 3d 4则要想获取值4,应使用哪一代码A. A[4]B. A['3']C. A.dD. A['d']
题目3单选题
data={'Ohio':3500,'Texas':7100,'Oregon':1600}obj3=Series(data)states=['California','Ohio','Texas','Oregon']obj4=Series(data,index=states)obj3+obj4输出结果为A. California NaNOhio 7000.0Oregon 3200.0Texas 14200.0dtype: float64B. Ohio 7000.0Oregon 3200.0Texas 14200.0dtype: float64C. 12200D. California NaNOhio 3500.0Texas 7100.0Oregon 1600.0dtype: float64
题目4单选题
data={'states':['Ohio','Ohio','Ohio','Nevada','Nevada'],'year':[2000,2001,2002,2001,2002],'pop':[1.5,1.7,3.6,2.4,2.9]}d=DataFrame(data)d输出结果为A. states year pop Ohio 2000 1.5 Ohio 2001 1.7 Ohio 2002 3.6 Nevada 2001 2.4 Nevada 2002 2.9B. states year pop0 Ohio 2000 1.51 Ohio 2001 1.72 Ohio 2002 3.63 Nevada 2001 2.44 Nevada 2002 2.9C. year states pop0 2000 Ohio 1.51 2001 Ohio 1.72 2002 Ohio 3.63 2001 Nevada 2.44 2002 Nevada 2.9D. pop year states0 1.5 2000 Ohio1 1.7 2001 Ohio2 3.6 2002 Ohio3 2.4 2001 Nevada4 2.9 2002 Nevada
题目5单选题
已知一个Series对象A为:a 1b 2c 3d 4则要想获取值4,应使用哪一代码A. A[4]B. A['3']C. dD. A['d']
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