过点（1，2，1），且垂直与向量（3，4，5）的平面的一般方程为：
A: 3(x-1) + 4(y-2) + 5(z-1)=0
B: 3x + 4y + 5z -16 = 0
C: 3(x-2) + 4(y-1) + 5(z-1) = 0
D: 3x + 4y + 5z = 0
A: 3(x-1) + 4(y-2) + 5(z-1)=0
B: 3x + 4y + 5z -16 = 0
C: 3(x-2) + 4(y-1) + 5(z-1) = 0
D: 3x + 4y + 5z = 0
举一反三
- 执行以下语句的结果：dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项，结果有误！ D: {"x":4,"y":2,"z":3,"a":5}
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