是以圣王制外乐以禁内情，而为之节文。 为：（）。
参考答案：为动用法，给……写。
All these gifts must be mailed immediately _ in time for Christmas.[ ]
A. in order to received
B. in order to receive
C. so as to be received
D. so as to be receiving
A．变压器输出功率为200W
B．若n1=100匝，则输出端线圈的磁通量变化率的最大值为2Wb/s
C．副线圈两端的电压表示数20V
D．变压器的输入功率是由发电厂的输出功率决定的
Wb/s
V