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问题 单项选择题

空投变压器时，若采用二次谐波按相制动逻辑的差动保护误动，则误动相一定是（）。

A.涌流最大的那一相

B.涌流较小的那一相

C.涌流较大且偶次谐波分量较小的那一相

D.涌流较大且奇次谐波分量较小的那一相

答案

参考答案：C

问答题

(b) Compute the taxable income of PQR (Pakistan) Ltd for the relevant tax year under the appropriate heads of income, giving clear reasons/explanations for the inclusion in or exclusion from the computation of taxable income of each of the items listed above.Note: the reasons/explanations for the items not listed in the computation of taxable income should be shown separately. Specific marks are allocated for this part of the requirement. (23 marks)
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单项选择题

对于给定的一组权值(2，3，4，11)，用其构造Huffman树，则其WPL为 (66) ，根节点的权值为 (67) 。

66（）

A．53

B．40

C．34

D．20
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