A.8Ua-2Ub=2 B.1.7Ua-0.5Ub=2 C.1.7Ua+0.

题库2022-08-02  7

问题 A.8Ua-2Ub=2B.1.7Ua-0.5Ub=2C.1.7Ua+0.5Ub=2D.1.7Ua-0.5Ub=-2

选项 A.8Ua-2Ub=2
B.1.7Ua-0.5Ub=2
C.1.7Ua+0.5Ub=2
D.1.7Ua-0.5Ub=-2

答案 B

解析
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